Joske's built a freestanding store in the vicinity of the future GALLERIA mall. Joske's-Post Oak, which opened in August 1963, became a "shadow anchor" of the shopping complex.

Photo from Allied Stores, Incorporated Annual Report 1963

 

A 2-level Neiman-Marcus became the first operational GALLERIA store, in January 1969.
Photo from https://www.hines.com / Hines Interests Limited Partnership

A fully-enclosed mall, added to Neiman-Marcus, was dedicated in late 1970. THE GALLERIA (a.k.a GALLERIA POST OAK) encompassed 600,000 leasable square feet, with an initial sixty stores and services. Parking was provided for 7,040 autos.