It was the home arena for the Atlanta Hawks of the National Basketball Association from 1972 until the arena 's closure in 1997 and the Atlanta Flames of the National Hockey League from their inception in 1972 until 1980 , when the franchise was sold and relocated to Calgary , Alberta . It also hosted the 1977 NCAA Men 's Division I Basketball Tournament , the 1988 Democratic National Convention , and the 1996 Summer Olympics indoor volleyball
1988 Democratic National Convention
1988 Democratic National Convention
Omni Coliseum