A head of George Washington, the first President of the United States, facing left.

Designer: John Flanagan (JF), 1932 version from a 1786 bust by Houdon / William Cousins.

Gateway Arch, Lewis and Clark and York returning down Missouri River. Caption: "Corps of Discovery 1804–2004".

The Gateway Arch is a 630-foot (192 m) monument in St. Louis in the U.S. state of Missouri. Clad in stainless steel and built in the form of an inverted, weighted catenary arch, it is the world's tallest arch, and Missouri's tallest accessible building. Built as a monument to the westward expansion of the United States, it is the centerpiece of the Jefferson National Expansion Memorial and has become an internationally famous symbol of St. Louis. The Gateway Arch was designed by Finnish-American architect Eero Saarinen in 1947; construction began on February 12, 1963, and was completed on October 28, 1965.

The Lewis and Clark Expedition, also known as the Corps of Discovery Expedition, was the first American expedition to cross what is now the western portion of the United States, departing in May 1804, from near St. Louis making their way westward through the continental divide to the Pacific coast. The expedition was commissioned by President Thomas Jefferson shortly after the Louisiana Purchase in 1803, consisting of a select group of U.S. Army volunteers under the command of Captain Meriwether Lewis and his close friend, Second Lieutenant William Clark. York (1770 – c. 1822) was an African-American slave best known for his participation with the Lewis and Clark Expedition.

Engraver: Alfred Maletsky (AM).