Windsor Park Mall was a shopping mall located on the northeast side of San Antonio, Texas, off Interstate 35 and Walzem Road. It opened in 1976 and closed in 2005.In 2007, the building, of which ownership was transferred to the suburb of Windcrest, Texas, became the new corporate headquarters of Rackspace, a Web hosting company. Their redevelopment of the mall structure, now known as "The Castle", has sparked a redevelopment of the surrounding area.History1976-2007: Windsor Park MallMelvin Simon and Associates announced their development plans for the mall in 1974, and the center opened on July 29, 1976. The original anchors were Montgomery Ward, JCPenney, Joske's and Dillard's. A 1985 expansion added Mervyns to the mall. In 1987, Joske's merged with Dillard's, and the former Joske's was converted into a Dillard's home store on the lower level, while the upper level was transformed into a food court, which cost $8 million. Simon opened Rolling Oaks Mall (also in northeast San Antonio) in 1989, and in conjunction with the new mall, Simon renovated Windsor Park between 1987 and November 1990. The second phase of renovations gave the mall a Southwestern theme, adding skylights and an octagon-shaped stage, as well as marble floors and new fountains. At this time, Windsor Park had 135 tenants and an occupancy rate of 97%.