The Old Quarter, near Hoàn Kiếm Lake, maintains most of the original street layout and some of the architecture of old Hanoi. At the beginning of the 20th century Hanoi consisted of the "36 streets", the citadel, and some of the newer French buildings south of Hoàn Kiếm lake, most of which are now part of Hoàn Kiếm district. Each street had merchants and households specializing in a particular trade, such as silk, jewelry or even bamboo. The street names still reflect these specializations, although few of them remain exclusively in their original commerce. The area is famous for its specializations in trades such as traditional medicine and local handicrafts, including silk shops, bamboo carpenters, and tin smiths. Local cuisine specialties as well as several clubs and bars can be found here also. A night market (near Đồng Xuân Market) in the heart of the district opens for business every Friday, Saturday, and Sunday evening with a variety of clothing, souvenirs and food.