If you were a millionaire in Pittsburgh in the late 1800s, of course you expected to have a mansion by Longfellow, Alden & Harlow. They were Andrew Carnegie’s favorite architects, after all. This Renaissance palace on Ridge Avenue is particularly splendid. Although it now belongs to the Community College of Allegheny County, its grand interior spaces have not been altered very much.

The cloister-like arcade in front is one of the most striking features of the house.

This gate, which is either original or at least quite old, is kept in beautiful shape.