Alpha Rho Chi (ΑΡΧ) is a professional co-educational college fraternity for students studying architecture and related professions. The fraternity's name is derived from the first three letters of the Greek word for architecture, αρχιτεκτονική.
APX was founded on April 11, 1914, with the joining of Sigma Upsilon at the University of Michigan and the Arcus Society at the University of Illinois to form a national fraternity for Architecture and the allied arts.
Sigma Upsilon was founded four years prior by eight architecture students at Michigan, with the intent of eventually forming a national architecture fraternity, and had drafted their constitution and laws to reflect that. Two years after they were founded in 1912 they were recognized by their school as a fraternity and started negotiation with other schools to open up more chapters.