A Philatelic Photo:
This stamp features a view of the US Capitol Building looking down Pennsylvania Avnenue, circa 1903. The trolley cars and rails are long gone and the buildings along Pennsylvania have changed as well, but the view looking diagonally down Pennsylvania Avenue to the Capitol can still be seen.
From the U.S. Stamp Gallery website:
The District of Columbia is a federal district, made up of land ceded by Maryland in 1791. The original district was 100 square miles, and included land ceded by Virginia. In 1846 Virginia's land was returned to the state. The 67-square-mile area houses the federal capital and the city that grew up with it, Washington, DC. President John Adams moved the government to the new capital in June 1800, and Congress met there for the first time the following year. Congress maintains veto power over all of the legislation of the Washington city council. Congressional appropriations are paid to the district in lieu of taxes on federal property, and the president retains the right to appoint district judges.
From the National Postal Museum website:
The Postal Service issued its 29-cent District of Columbia Bicentennial commemorative stamp on September 7, 1991, in Washington, DC.
In January 1791, President George Washington selected the site for the nation's capital. The stamp's design features a 1903 tree-lined vista of Pennsylvania Avenue.
Designed by Pierre Mion, the stamps were printed through the intaglio/offset process by the Bureau of Engraving and Printing and issued in panes of fifty.