Is this InterContinental Nanjing by IHG pet-friendly for guests?

No, pets are not allowed at this property. Check the guest reviews to learn what guests had to share.

What time is check-in & check-out at InterContinental Nanjing by IHG?

Check-in time for InterContinental Nanjing by IHG starts counting from 3:00 PM and check-out is until 12:00 PM. However, early check-in or late check-out can sometimes be negotiated between the guest and the owner or the manager of this property.

Does the InterContinental Nanjing by IHG have a swimming pool?

Yes, this InterContinental Nanjing by IHG has a swimming pool. Check the Facility Overview section for details about the pool and other available facilities.

How much does it cost per night to stay in InterContinental Nanjing by IHG?

Best-rates for the InterContinental Nanjing by IHG starts from $136 per night with includes Air Conditioner, Parking, Accessibility, Security/Safety, Wellness Facilities, Toiletries, Wheelchair Accessible, Internet, Laundry, Bar, Child Friendly, Kitchen, Pool, Private Pool, Balcony/Terrace, Business Services, Restaurant, Guest Services with all other facilities. matches every traveler with their perfect accommodation, whether you are traveling with a group, friends, family, or pets.

Is InterContinental Nanjing by IHG a family-friendly place to stay?

Based on the information we have received from the owner or our partner, this is considered to be a family-friendly property. Families have rated this hotel 5 stars or guests have recommended them suitable for families. As reported by the owner or manager, the hotel has specified that children are welcome. Please see details about suitability for your family or inquire with the property to learn more.

Is the InterContinental Nanjing by IHG wheelchair accessible or offer services for disabled guests?

Based on the information received from our partner, the InterContinental Nanjing by IHG is wheelchair accessible. Likewise, there is an elevator specified as being available at the property. Specific accessibility details may be addressed in the property details section of this page.

What is the minimum night stay policy for the InterContinental Nanjing by IHG?

Based on the information reported by the owner or manager, the InterContinental Nanjing by IHG indicates 1 day stay policy at this hotel. Guests are cautioned that the minimum stay policy may differ based on seasonality or availability and may be at the discretion of the owner or manager.

What cancellation policy is in place for InterContinental Nanjing by IHG?

Guests are cautioned that the cancellation policy may differ based on seasonality, availability, or current travel restrictions. Guests should also be aware that this policy may be subject to change and should be confirmed prior to booking. More details may be available on this page in the property description. However, early check-in or late check-out can sometimes be negotiated between the guest and the owner or the manager of this property.

InterContinental Nanjing by IHG | Hotel in Gu Lou

| 8.4 (192 Reviews) | 15 Bathrooms 46 Guests

Gu Lou Hotel | InterContinental Nanjing by IHG

Hotel in Gu Lou

Centrally located in Gulou Square, 1 minute walk from Gulou Subway Station Exit 4A (Line 1 & Line 4), InterContinental Nanjing features 433 modern stylish rooms above 49th floor. Guests can enjoy Nanjing city skyline in the room. Free parking is offered in the hotel. An indoor and an outdoor pool, SPA and 4 restaurants with gourmet cuisines are available on site. InterContinental Nanjing is 10 minutes' drive from Xuanwu Lake and 36 minutes' drive to Dr Sun Yat-Sen Museum. Nanjing Railway Station is a 15-minute drive away, while Lukou International Airport is a 40-minute ride away. Within walking distance of the property, guests can reach Dazhongting, Gulou Park, Xuanwu Lake, Nanjing University, Southeast University and Jiming Temple. InterContinental Nanjing's rooms are equipped with a flat-screen cable, an IDD telephone with voicemail and iPod dock. All rooms are nonsmoking and offer a tea and coffee maker. Guests will find a flat-screen TV with satellite channels. A mini-bar, ironing facilities, an electrical kettle and a safety deposit box is also to be found. All rooms come with PM 2.5 air purifiers. Certain rooms feature stunning lake view. In the well-furnished private bathroom, bathrobes, free toiletries and a hairdryer is provided for guests' comfort. A fitness center is available for those wishing to work out after a long journey. Two 800-yard-square large pillars-less ballrooms and 7 meeting rooms can meet a variety of meeting requirements. Relax at indoor and outdoor swimming pool, gym, and international SPA on 8 floor. For their convenience, guests will find currency exchange service for their convenience and they can do laundry services as well. Guests can hire a car at the hotel and explore Nanjing by themselves. In the 24-hour front desk, local trips can be arranged to nearby scenic spots. Staff at the reception can assist with luggage storage service upon guests' requests. Prime Restaurant•Bar•Lounge on 78th floor with 1050 feet height is branded as the highest restaurant in Jiangsu, and Summit Restaurant located on 76th floor with 984 feet height also be named as highest Chinese restaurant in the province.

InterContinental Nanjing by IHG is located in .

This 526 Bedrooms Hotel is suitable for tourists and travelers. It has several amenities that would guarantee your comfort. These amenities include: Parking, Accessibility, Security/Safety, and several others. This is a 5 star rated property and has over 192 reviews with the average score of 8.4 . Coming to and needing a place to stay? Be it for work or for leisure, consider staying at this Hotel for your next visit, you will surely love it.

You can check the reviews and description of this 526 Bedrooms Hotel if you want to learn more about this place in . These details are authentic, as they are provided by our partner, booking.com.

This InterContinental Nanjing by IHG in is well equipped and has all facilities that have been listed below. Please note that these details were shared to us by booking.com for the listed “InterContinental Nanjing by IHG”. We solely rely on their shared details and are regarded as “accurate”. If you have any concerns about the information or accuracy describing this Hotel, please let us know.

Amenities

Air Conditioner

Parking

Pool

Wheelchair Accessible

Private Pool

Balcony/Terrace

Accessibility

Security/Safety

Business Services

Wellness Facilities

Restaurant

Bar

Toiletries

Guest Services

Child Friendly

Internet

Kitchen

Laundry

Facility Overview

Breakfast

Fruit

Kid-friendly buffet

Restaurant

Coffee house on site

Parking

Parking on site

Private Parking

Parking garage

Free parking

Parking

Accessibility

Lowered sink

Bathroom emergency cord

Wheelchair accessible

Toilet with grab rails

Activities

Open-air bath

Indoor pool

Fitness center

Indoor pool (year-round)

Fitness

Happy hour

General

Wifi in all areas

Non-smoking rooms

Facilities for disabled guests

Elevator

Safe

Air conditioning

Soundproof rooms

Guest Services

Tour desk

Dry cleaning

Currency exchange

Daily housekeeping

Ironing service

Business center

Baggage storage

Concierge

Meeting/Banquet facilities

Fax/Photocopying

24-hour front desk

Room service

Laundry

Private check-in/out

Express check-in/out

Invoice provided

Internet

Internet

Free Wifi

Wifi

Outdoors

Terrace

Security/Safety

24-hour security

CCTV outside property

Key card access

Smoke alarms

Fire extinguishers

Security alarm

CCTV in common areas

Guests have the option to cancel any cleaning services for their accommodation during their stay

Linens, towels, and laundry washed in accordance with local authority guidelines

Delivered food covered securely

Food can be delivered to guest accommodation

All plates, cutlery, glasses, and other tableware sanitized

Physical distancing in dining areas

Hand sanitizer in guest accommodation and common areas

Staff follow all safety protocols as directed by local authorities

Cashless payment available

Spa

Swimming pool

Policies

Check-in

The minimum age for check-in is 18

Cancellation policy

Free cancellation

Payment Policy

Credit card required

Pet Policy

Pets are not allowed

Guests are required to show a valid government-issued id card or passport upon check-in. , breakfast will be served at the 45th-floor horizon café restaurant from 06:30 to 10:00 am. a la carte menus will be available for lunch and dinner at the 45th 45th-floor sky lounge. for any other meals, in-room service will operate between 06:30 and 22:30. , please note that children must provide an id card, household registration or birth certificate.

Reviews

Value for money:

8.55

Location:

9.14

Staff:

8.73

Facilities:

8.68

Comfort:

8.89

Cleanliness:

9.16

Bazargul

Jan 11, 2026 08:00:00 AM

Review Score: 9

Kazakhstan

Reviewer Type: Couple

Travel Purpose: business

See All Reviews

Room Arrangement

Room Info	Facilities
1 King Premium Lake View Lounge Access Room Type: Double Room Size: 62 m² 1 King bed(s) Bed	Food & Drink Bottle of water, Minibar Bathroom Slippers, Towels, Conditioner, Bathtub, Toilet paper, Shower cap, Private bathroom, Shampoo, Toilet, Toothbrush, Hairdryer, Body soap, Shower, Bathrobe, Free toiletries, Bathtub or shower General Trash cans, Carpeted, Soundproof, Iron, Hardwood or parquet floors, Key card access, Safe, Air conditioning, Ironing facilities, Lockers Media & Technology Telephone, TV, Cable channels, Satellite channels Services Executive lounge access, Wake-up service, Wake-up service/Alarm clock Activities Hot tub Living Area Sofa, Desk View Lake view, Mountain view, Landmark view, View Bedroom Wardrobe or closet, Childrens' cribs, Linens, Alarm clock Kitchen Electric kettle Room Amenities Feather pillow, Socket near the bed, Clothes rack Pool and Spa Heated pool Cleanliness & disinfection Hand sanitizer
Junior Suite with Club Lounge Access Room Type: Suite Room Size: 70 m² 1 King bed(s) Bed	Food & Drink Fruit, Bottle of water, Minibar Bathroom Slippers, Towels, Conditioner, Bathtub, Toilet paper, Shower cap, Private bathroom, Shampoo, Toilet, Toothbrush, Hairdryer, Body soap, Shower, Bathrobe, Free toiletries, Bathtub or shower General Trash cans, Carpeted, Soundproof, Iron, Hardwood or parquet floors, Key card access, Safe, Air conditioning, Ironing facilities, Lockers Media & Technology Telephone, TV, Cable channels, Satellite channels Services Executive lounge access, Wake-up service, Wake-up service/Alarm clock Activities Hot tub Living Area Sofa, Sitting area, Desk Bedroom Linens, Alarm clock, Childrens' cribs, Wardrobe or closet, Walk-in closet View City view, Quiet street view, Landmark view, View Kitchen Electric kettle, Coffee machine, Wine glasses Room Amenities Feather pillow, Socket near the bed, Clothes rack, Sofa bed Pool and Spa Heated pool Exclusive services Complimentary evening snacks and drinks in the executive lounge, Free newspapers and magazines in the executive lounge, Private check-in/out in the executive lounge, Complimentary access to conference room/business areas, Complimentary afternoon snacks and drinks in the executive lounge, Concierge services, Free gym access, Free laundry services Cleanliness & disinfection Hand sanitizer
Classic King Room with City View Room Type: Double Room Size: 48 m² 1 King bed(s) Bed	Food & Drink Bottle of water, Minibar Bathroom Slippers, Towels, Conditioner, Bathtub, Toilet paper, Shower cap, Private bathroom, Shampoo, Toilet, Toothbrush, Hairdryer, Body soap, Shower, Bathrobe, Free toiletries, Bathtub or shower General Trash cans, Carpeted, Interconnecting room(s) available, Iron, Soundproof, Hardwood or parquet floors, Key card access, Safe, Air conditioning, Ironing facilities, Lockers Media & Technology Telephone, TV, Cable channels, Satellite channels Services Wake-up service, Wake-up service/Alarm clock Activities Hot tub Living Area Sofa, Desk View City view, Quiet street view, Landmark view, View Bedroom Wardrobe or closet, Childrens' cribs, Linens, Alarm clock Kitchen Electric kettle Room Amenities Feather pillow, Socket near the bed, Clothes rack Pool and Spa Heated pool Layout Window Cleanliness & disinfection Hand sanitizer
Classic Double Room with Two Double Beds and Lake View Room Type: Double Room Size: 48 m² 2 Full bed(s) Bed	Food & Drink Bottle of water, Minibar Bathroom Slippers, Towels, Conditioner, Bathtub, Toilet paper, Shower cap, Private bathroom, Shampoo, Toilet, Toothbrush, Hairdryer, Body soap, Shower, Bathrobe, Free toiletries, Bathtub or shower General Trash cans, Carpeted, Interconnecting room(s) available, Iron, Soundproof, Hardwood or parquet floors, Key card access, Safe, Air conditioning, Ironing facilities, Lockers Media & Technology Telephone, TV, Cable channels, Satellite channels Services Wake-up service, Wake-up service/Alarm clock Activities Hot tub Living Area Sofa, Desk View Lake view, Mountain view, Landmark view, View Bedroom Wardrobe or closet, Childrens' cribs, Linens, Alarm clock Kitchen Electric kettle Room Amenities Feather pillow, Socket near the bed, Clothes rack Pool and Spa Heated pool Layout Window Cleanliness & disinfection Hand sanitizer
One-Bedroom King Suite with Lake View Room Type: Suite Room Size: 108 m² 1 King bed(s) Bed	Food & Drink Fruit, Bottle of water, Minibar Bathroom Slippers, Towels, Conditioner, Bathtub, Toilet paper, Shower cap, Private bathroom, Guest bathroom, Shampoo, Toilet, Toothbrush, Hairdryer, Body soap, Shower, Bathrobe, Free toiletries, Bathtub or shower General Trash cans, Carpeted, Interconnecting room(s) available, Iron, Soundproof, Hardwood or parquet floors, Key card access, Safe, Air conditioning, Ironing facilities, Lockers Media & Technology Telephone, TV, Cable channels, Satellite channels Services Executive lounge access, Wake-up service, Wake-up service/Alarm clock Activities Hot tub Kitchen Electric kettle, Coffee machine, Wine glasses, Refrigerator Living Area Sofa, Sitting area, Desk Bedroom Linens, Alarm clock, Childrens' cribs, Wardrobe or closet, Walk-in closet View Lake view, Mountain view, Landmark view, View Room Amenities Feather pillow, Socket near the bed, Clothes rack, Sofa bed Pool and Spa Heated pool Safety features Air purifiers Exclusive services Complimentary evening snacks and drinks in the executive lounge, Free newspapers and magazines in the executive lounge, Private check-in/out in the executive lounge, Complimentary access to conference room/business areas, Complimentary afternoon snacks and drinks in the executive lounge, Concierge services, Free gym access, Free laundry services Cleanliness & disinfection Hand sanitizer
Classic King Room with Lake View Room Type: Double Room Size: 48 m² 1 King bed(s) Bed	Food & Drink Bottle of water, Minibar Bathroom Slippers, Towels, Conditioner, Bathtub, Toilet paper, Shower cap, Private bathroom, Shampoo, Toilet, Toothbrush, Hairdryer, Body soap, Shower, Bathrobe, Free toiletries, Bathtub or shower General Trash cans, Carpeted, Soundproof, Iron, Hardwood or parquet floors, Key card access, Safe, Air conditioning, Ironing facilities, Lockers Media & Technology Telephone, TV, Cable channels, Satellite channels Services Wake-up service, Wake-up service/Alarm clock Activities Hot tub Living Area Sofa, Desk View Lake view, Mountain view, Landmark view, View Bedroom Wardrobe or closet, Childrens' cribs, Linens, Alarm clock Kitchen Electric kettle Room Amenities Feather pillow, Socket near the bed, Clothes rack Pool and Spa Heated pool Cleanliness & disinfection Hand sanitizer
Classic Double Room with Two Double Beds and City View Room Type: Double Room Size: 48 m² 2 Full bed(s) Bed	Food & Drink Bottle of water, Minibar Bathroom Slippers, Towels, Conditioner, Bathtub, Toilet paper, Shower cap, Private bathroom, Shampoo, Toilet, Toothbrush, Hairdryer, Body soap, Shower, Bathrobe, Free toiletries, Bathtub or shower General Trash cans, Carpeted, Interconnecting room(s) available, Iron, Soundproof, Hardwood or parquet floors, Key card access, Safe, Air conditioning, Ironing facilities, Lockers Media & Technology Telephone, TV, Cable channels, Satellite channels Services Wake-up service, Wake-up service/Alarm clock Activities Hot tub Living Area Sofa, Desk View Quiet street view, View, Landmark view, Mountain view, City view Bedroom Wardrobe or closet, Childrens' cribs, Linens, Alarm clock Kitchen Electric kettle Room Amenities Feather pillow, Socket near the bed, Clothes rack Pool and Spa Heated pool Cleanliness & disinfection Hand sanitizer
Classic Room Room Type: Double Room Size: 48 m² 1 King bed(s) Bed	Food & Drink Bottle of water, Minibar Bathroom Slippers, Towels, Conditioner, Bathtub, Toilet paper, Shower cap, Private bathroom, Shampoo, Toilet, Toothbrush, Hairdryer, Body soap, Shower, Bathrobe, Free toiletries, Bathtub or shower General Trash cans, Carpeted, Soundproof, Iron, Hardwood or parquet floors, Key card access, Safe, Air conditioning, Ironing facilities, Lockers Media & Technology Telephone, TV, Cable channels, Satellite channels Services Wake-up service, Wake-up service/Alarm clock Activities Hot tub Living Area Sofa, Desk View City view, Quiet street view, Landmark view, View Bedroom Wardrobe or closet, Childrens' cribs, Linens, Alarm clock Kitchen Electric kettle Room Amenities Feather pillow, Socket near the bed, Clothes rack Pool and Spa Heated pool Cleanliness & disinfection Hand sanitizer
1 King Bed Classic Lake View Lounge Access Room Type: Double Room Size: 48 m² 1 King bed(s) Bed	Food & Drink Bottle of water, Minibar Bathroom Slippers, Towels, Conditioner, Bathtub, Toilet paper, Shower cap, Private bathroom, Shampoo, Toilet, Toothbrush, Hairdryer, Body soap, Shower, Bathrobe, Free toiletries, Bathtub or shower General Trash cans, Carpeted, Soundproof, Iron, Hardwood or parquet floors, Key card access, Safe, Air conditioning, Ironing facilities, Lockers Media & Technology Telephone, TV, Cable channels, Satellite channels Services Executive lounge access, Wake-up service, Wake-up service/Alarm clock Activities Hot tub Living Area Sofa, Desk View Lake view, Mountain view, Landmark view, View Bedroom Wardrobe or closet, Childrens' cribs, Linens, Alarm clock Kitchen Electric kettle Room Amenities Feather pillow, Socket near the bed, Clothes rack Pool and Spa Heated pool Cleanliness & disinfection Hand sanitizer
One-Bedroom Dining Suite with Lake View Room Type: Suite Room Size: 143 m² 1 King bed(s) Bed	Food & Drink Fruit, Bottle of water, Chocolate/Cookies, Minibar Bathroom Slippers, Towels, Conditioner, Bathtub, Toilet paper, Shower cap, Private bathroom, Guest bathroom, Shampoo, Toilet, Toothbrush, Hairdryer, Body soap, Shower, Bathrobe, Free toiletries, Bathtub or shower General Trash cans, Carpeted, Soundproof, Iron, Hardwood or parquet floors, Key card access, Safe, Air conditioning, Ironing facilities, Lockers Media & Technology Telephone, TV, Cable channels, Satellite channels Services Executive lounge access, Wake-up service, Wake-up service/Alarm clock Activities Hot tub Kitchen Electric kettle, Coffee machine, Wine glasses, Dining table, Refrigerator Living Area Sofa, Dining area, Sitting area, Desk Bedroom Linens, Alarm clock, Childrens' cribs, Wardrobe or closet, Walk-in closet View Lake view, Mountain view, Landmark view, View Room Amenities Feather pillow, Socket near the bed, Clothes rack, Sofa bed Pool and Spa Heated pool Safety features Air purifiers Exclusive services Complimentary evening snacks and drinks in the executive lounge, Free newspapers and magazines in the executive lounge, Private check-in/out in the executive lounge, Complimentary access to conference room/business areas, Complimentary afternoon snacks and drinks in the executive lounge, Concierge services, Free gym access, Free laundry services Cleanliness & disinfection Hand sanitizer
Deluxe King Room with City View Room Type: Double Room Size: 48 m² 1 King bed(s) Bed	Food & Drink Bottle of water, Minibar Bathroom Slippers, Towels, Conditioner, Bathtub, Toilet paper, Shower cap, Private bathroom, Shampoo, Toilet, Toothbrush, Hairdryer, Body soap, Shower, Bathrobe, Free toiletries, Bathtub or shower General Trash cans, Carpeted, Iron, Hardwood or parquet floors, Key card access, Safe, Air conditioning, Ironing facilities, Lockers Media & Technology Telephone, TV, Cable channels, Satellite channels Services Wake-up service, Wake-up service/Alarm clock Activities Hot tub Living Area Sofa, Desk View City view, Quiet street view, Landmark view, View Bedroom Wardrobe or closet, Childrens' cribs, Linens, Alarm clock Kitchen Electric kettle Room Amenities Feather pillow, Socket near the bed, Clothes rack Pool and Spa Heated pool Cleanliness & disinfection Hand sanitizer
Classic Room with Two Double Beds - High Floor Room Type: Double Room Size: 48 m² 2 Full bed(s) Bed	Food & Drink Bottle of water, Minibar Bathroom Slippers, Towels, Conditioner, Bathtub, Toilet paper, Shower cap, Private bathroom, Shampoo, Toilet, Toothbrush, Hairdryer, Body soap, Shower, Bathrobe, Free toiletries, Bathtub or shower General Trash cans, Carpeted, Iron, Hardwood or parquet floors, Key card access, Safe, Air conditioning, Ironing facilities, Lockers Media & Technology Telephone, TV, Cable channels, Satellite channels Services Wake-up service, Wake-up service/Alarm clock Activities Hot tub Living Area Sofa, Desk View City view, Quiet street view, Landmark view, View Bedroom Wardrobe or closet, Childrens' cribs, Linens, Alarm clock Kitchen Electric kettle Room Amenities Feather pillow, Socket near the bed, Clothes rack Pool and Spa Heated pool Cleanliness & disinfection Hand sanitizer
Club King Room Room Type: Double Room Size: 48 m² 1 King bed(s) Bed	Food & Drink Bottle of water, Minibar Bathroom Slippers, Towels, Conditioner, Bathtub, Toilet paper, Shower cap, Private bathroom, Shampoo, Toilet, Toothbrush, Hairdryer, Body soap, Shower, Bathrobe, Free toiletries, Bathtub or shower General Trash cans, Carpeted, Iron, Hardwood or parquet floors, Key card access, Safe, Air conditioning, Ironing facilities, Lockers Media & Technology Telephone, TV, Cable channels, Satellite channels Services Executive lounge access, Wake-up service, Wake-up service/Alarm clock Activities Hot tub Living Area Sofa, Desk View City view, Quiet street view, Landmark view, View Bedroom Wardrobe or closet, Childrens' cribs, Linens, Alarm clock Kitchen Electric kettle Room Amenities Feather pillow, Socket near the bed, Clothes rack Pool and Spa Heated pool Cleanliness & disinfection Hand sanitizer
Classic Double Room with Lake View - Club Lounge Access Room Type: Double Room Size: 48 m² 2 Full bed(s) Bed	Food & Drink Bottle of water, Minibar Bathroom Slippers, Towels, Conditioner, Bathtub, Toilet paper, Shower cap, Private bathroom, Shampoo, Toilet, Toothbrush, Hairdryer, Body soap, Shower, Bathrobe, Free toiletries, Bathtub or shower General Trash cans, Carpeted, Iron, Hardwood or parquet floors, Key card access, Safe, Air conditioning, Ironing facilities, Lockers Media & Technology Telephone, TV, Cable channels, Satellite channels Services Executive lounge access, Wake-up service, Wake-up service/Alarm clock Activities Hot tub Living Area Sofa, Desk View Lake view, Mountain view, Landmark view, View Bedroom Wardrobe or closet, Childrens' cribs, Linens, Alarm clock Kitchen Electric kettle Room Amenities Feather pillow, Socket near the bed, Clothes rack Pool and Spa Heated pool Cleanliness & disinfection Hand sanitizer
Family Suite Room Type: Suite Room Size: 108 m² 2 Full bed(s) Bed	Food & Drink Bottle of water, Minibar Bathroom Slippers, Towels, Conditioner, Bathtub, Toilet paper, Shower cap, Private bathroom, Shampoo, Toilet, Toothbrush, Hairdryer, Body soap, Shower, Bathrobe, Free toiletries, Bathtub or shower General Trash cans, Carpeted, Iron, Hardwood or parquet floors, Key card access, Safe, Air conditioning, Ironing facilities, Lockers Media & Technology Telephone, TV, Cable channels, Satellite channels Services Executive lounge access, Wake-up service, Wake-up service/Alarm clock Activities Hot tub Kitchen Electric kettle, Coffee machine, Wine glasses, Refrigerator Living Area Sofa, Sitting area, Desk View Landmark view, View Bedroom Wardrobe or closet, Childrens' cribs, Linens, Alarm clock Room Amenities Feather pillow, Socket near the bed, Clothes rack Pool and Spa Heated pool Cleanliness & disinfection Hand sanitizer