The Arminius Hotel is a historic hotel in Portland, Oregon, United States. It was built in 1904 by Otto Kleeman, and is on the National Register of Historic Places. The inscription A.D.U.G. stands for the Allgemeine Deutsche Unterstützungsgesellschaft (General German Aid Society) that constructed the building. References 1904 establishments in Oregon German-American culture in Portland, Oregon Hotel buildings completed in 1904 Hotel buildings on the National Register of Historic Places in Portland, Oregon Hotels established in 1904 Portland Historic Landmarks Southwest Portland, Oregon