This city was Tenochtitlan; it had about 200 000 people (some scholars estimate at 300 000 however). There was another city next to it: Tlatelolco. Today Tlatelolco in in Mexico city.
There is a lot there is websites specifically for historical facts if you want to look at those

The important places which glorify nepal are
- Durbar Square
- Shree Pashupatinath Temple
- Bhoudanath Stupa
- Changu Narayan Temple
- Lumbini
- Patan Durbar Square
- Swayambhunath Stupa
- Kathmandu Durbar Square
- Janakpur
- Muktinath Temple
- Mustang Caves
- Janaki Mandir
- Kopan Monastery
- Complex of Ruru Kshetra
- Sagarmatha National Park