Deutsches Freimaurer-Museum, Freemasonry museum in Bayreuth, Germany.

The Deutsches Freimaurer-Museum in Bayreuth is a museum dedicated to Freemasonry that displays extensive collections of material culture. The exhibition features manuscripts, printed books, ceremonial robes, and other objects that document how this movement evolved across several centuries.

The bookseller Georg Niehrenheim began assembling the collection in 1902 in the lodge house of Eleusis zur Verschwiegenheit, built 1881–1884. From 1912 the physician Bernhard Beyer led the museum and made it the third largest of its kind by 1930. On 24 October 1933 Nazi police dissolved it, carting off the library and archive; the looted holdings remain lost. After the war Beyer and his successors rebuilt the collection from scratch.

The museum keeps objects used in lodge work: 20 ritual carpets, over 160 Masonic aprons and 3,100 lodge badges (Bijoux) and medals. Its archive holds 20,000 membership lists from lodges across Germany, from 1757 onward, digitised since 2004. The lodge Eleusis zur Verschwiegenheit still meets in the 1881–1884 building that houses the collection.

A visit requires planning since the museum operates on specific days only and with limited hours. It is wise to check opening times in advance and consider contacting the facility beforehand to ensure entry.

Among the museum's holdings is one of only three original Illuminati insignia known worldwide, kept in its storage magazine. The library itself holds 19,000 volumes and is connected to the official interlibrary loan system of German libraries. Since 2004, some 20,000 lodge membership directories dating from 1757 onward have been recorded electronically.