Castle Hall, the lodge of the Knights of Pythias, a fraternal organization, replaced a predecessor that burned in 1901. The castle’s architectural form evokes a northern European Renaissance guildhall. Stepped gables, vertical proportions, and transverse side gables contribute to its stylistic identity. The assembly hall is on the third floor and is accessible by a staircase at the southeast rear corner of the building.
A Club Building was added to the Hall in 1920. A large oriel window centered on the west front of the building, a nod perhaps to its late-nineteenth-century context, and other details caused historian Jay C. Henry in his book Architecture in Texas: 1895–1945 (1993) to call this “one of the most unusual buildings of its date in Texas” The castle was rehabilitated in 1981 as a component of Sundance Square (FW5).