Maine became the 23rd state to be admitted into the Union, as part of the Missouri Compromise on March 15, 1820. The Maine quarter design incorporates a rendition of the Pemaquid Point Light atop a granite coast and of a schooner at sea. Pemaquid Point Light is located in New Harbor, and marks the entrance to Muscongus Bay and Johns Bay. Since the beginning of ship activity in the area, a shoal created hazardous navigation conditions, causing many shipwrecks.2003D