Benno Janssen was an American architect.
Janssen from Western Pennsylvanians, 1923
The Pittsburgh Athletic Association (1911), listed on the National Register of Historic Places
Alumni Hall (1915) at the University of Pittsburgh, formerly the Masonic Temple, went through a two-year, $16 million preservation and renovation effort that was completed in 2000
Mellon Institute (1937) is known for its monolithic columns, the largest such one-piece columns in the world
MacClure & Spahr was an architectural firm based in Pittsburgh, Pennsylvania which was active from 1901 to 1922. Several of the firm's buildings have received historic designations. The firm was a partnership between Colbert Anderson MacClure (1879–1912) and Albert Hubbard Spahr (1873–1966), both of whom had studied at the Massachusetts Institute of Technology.
MacClure and Spahr as depicted in Palmer's Pictorial Pittsburgh, 1905
Acheson House (1903)
Diamond Building (1905)
University Club (1907)