In 1991, Francis and Ann M. Koenig donated this property to Calvert County with the intention that it be developed into a sculpture garden. Over the next decade, their dream took shape as six works of art were installed on the thirty-acre property. These diverse pieces are fully integrated into the natural setting of the Garden and provide the opportunity to develop an appreciation for the seasonal changes inherent in outdoor art. In addition to the sculpture, walking paths were created, and the alleys, or hallways, were cleared. The lovely alleys allow visitors to look across Annmarie and have created areas for the installation of sculpture.
In 2003, Annmarie became a member of the Smithsonian Institution’s Affiliations Program. This program has allowed the Garden to borrow more than twenty-five pieces of sculpture from the Smithsonian’s Hirshhorn Museum & Sculpture Garden. In 2008, the Arts Building and the Studio School opened, allowing Annmarie to dramatically expand its programs and activities.