I just love love love Newport Mansions: Postcards of the Gilded Age by Frederico Santi and John Gacher. This book shows over 200 postcards of street views, mansions, and beach scenes in Newport, Rhode Island.
Backgrounds on the lives of the owners of the mansions is given in some places, architects are named, and the end result of the mansion is stated in most cases- demolished, burned by fire, part of a university, available to tour, etc. It is a shame that some of these magnificent estates were demolished.
Of course, I had to pick my favorite mansion in the book. Other people than the Vanderbilts and Astors lived here you know! I picked Ochre Court, the residence of Mrs. Ogden Goelet. Today, it is the administration building at Salve Regina University.
A view of Ochre Court today as the Administration Building, found on the Salve Regina website.