Passage: The OFID Headquarters (located in Vienna's first district, on the Ringstraße) was the residential palace of the Austrian Archduke Wilhelm Franz Karl. Built between 1864 and 1868 to the architectural design of Theophil von Hansen, the palace was sold to the German Order of Knights (Teutonic Order) in 1870 and used as headquarters of the Grand Master, the last of whom was Archduke Eugen. From 1894, it served as the palace of both the Grand and German Masters, acquiring the name, Deutschmeister-Palais. In 1938 following the dissolution of the German Order of Knights, the building was seized by National Socialist (Nazi) Germany and, in 1942, it was handed over to the police authorities. Between 1945 and 1975, it served as headquarters of the Vienna police. After an interregnum, the building became the property of OFID.

Question: When did The OFID Headquarters start serving as a palace?
From 1894