Battle of Lexington

British troops fire on colonists, who had gathered at Lexington to stop them from going on to Concord to destroy a colonial supply depot. Major Pitcairn, the British officer on horseback, had ordered the colonists to disarm and disperse. As they began to do so, a single shot was fired, which led to an exchange of fire between a British platoon and the colonial militia. Eight militiamen were killed and ten wounded before Pitcairn regained control of his troops. Thus the American Revolution started, with "the shot heard round the world." (1775)

About the Frieze of American History

The frieze in the Rotunda of the United States Capitol contains a painted panorama depicting significant events in American history. Thomas U. Walter's 1859 cross-section drawing of the new dome (constructed 1855-1863) shows a recessed belt atop the Rotunda walls with relief sculpture.

Eventually it was painted in true fresco, a difficult and exacting technique in which the pigments are applied directly onto wet plaster. As the plaster cures the colors become part of the wall. Consequently, each section of plaster must be painted the day it is laid. The frieze is painted in grisaille, a monochrome of whites and browns that resembles sculpture. It measures 8 feet 4 inches in height and approximately 300 feet in circumference. It starts 58 feet above the floor.