Fairmount Water Works from the forebay, 1833
Bridge Street Draw, southeast corner property, June 12, 1896
Back of the State House, Philadelphia, 1800
Arch Street, with the Second Presbyterian Church, 1800
Front St. and Market St., 1881
The art and science of planning, designing, and erecting buildings or other structures. This topic overlaps with engineering, in that any building needs to be properly engineered to prevent catastrophic failures, and large architectural firms often employ engineers.