Established in 1889, Dong Xuan Market is housed within a four-storey Soviet-style building on the northern edge of Hanoi Old Quarter. It’s also known as Hanoi’s largest indoor market, offering a wide range of goods such as fresh produce, souvenirs, accessories and clothing, as well as electronic and household appliances.
Similar to most markets in Southeast Asia, Dong Xuan Market has a bustling wet market section on the ground floor, where locals shop for seafood, meat, and vegetables while the back section sells an array of pets (cats, dogs, and fish) and fresh flowers from all across Vietnam. If you’re looking to shop for souvenirs, head to the upper levels, where you can find numerous stalls selling tee shirts, fabrics, school uniforms, handbags, handicrafts, all of which are sold at wholesale prices.
http://www.vietnam-guide.com/hanoi/shopping/dong-xuan-market.htm