Baltimore Cathedral by Richard D. L. Fulton The United States Postal Service (USPS) issued a series of 15-cent stamps, featuring examples of early “architecture of enduring beauty, strength and usefulness,” according to the Smithsonian National Postal Museum, on June 4, 1979. The first set of four different stamps was issued on June 4, 1979, and…

Baltimore-Washington HPO Richard D. L. Fulton TThe United States Postal Service (USPS) inaugurated its first Highway Post Office (HPO) on February 10, 1941, and added a Baltimore-Washington route to the HPO system on November 16, 1943. Each time a new route was added to the service routes of the HPO, a commemorative “first-trip cover” was…