The Union Trust Building is a high-rise building located in the Downtown district of Pittsburgh, Pennsylvania, at 501 Grant Street. It was erected in 1915–16 by the industrialist Henry Clay Frick. The Flemish-Gothic structure's original purpose was to serve as a shopping arcade.
Exterior of the Union Trust Building on Grant Street in Downtown Pittsburgh
The roof of the Union Trust Building
Frederick J. Osterling
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Frederick John Osterling was an American architect, practicing in Pittsburgh from 1888.
Frederick J. Osterling Office and Studio
Byrnes & Kiefer Building