The first expansion, known as Galleria II, was completed in 1976 and added 360,000 ft² (33,000 m²) of retail space on two levels, as well as Lord & Taylor and Frost Bros. Marshall Field's joined the mall in 1979, in a store designed by noted architect Philip Johnson.
In January 2005, Lord & Taylor closed their store, with its former space being partially demolished and incorporated into the mall as an additional 100,000 ft² (9,300 m²) of retail space that opened in August 2006.