The Pythian Castle Lodge, also known as Crystal Palace, in Milwaukee, Wisconsin, United States, was built in 1927 by the Knights of Pythias, a fraternal organization.

It is a two-story brick structure on a poured concrete foundation with a roof that is flat in parts and hipped elsewhere, covered in clay tile.

[3] Oberst also designed the Excelsior Masonic Temple at 2422 W. National Avenue in Milwaukee,[4] a Classical Revival building from 1922 that was deemed to be NRHP-eligible but was not listed on the NRHP due to owner objection.

Unlike the Freemasons, the Pythians rented their space out to other organizations, including labor groups like the Order of Railroad Engineers, the Harvester Tool Makers, Painters and Varnishers, the Firefighters Local No.

215, the Hatters Local, and the Die Sinkers Union; also the Squirrel Club, the South Side Civic Association, and the Navy Fathers.