While commemorating the American Unitarian Association's centennial in 1925, one of Eliot's final acts as President was to move the association to a new headquarters on Beacon Street. The new building, completed in 1927, retained the AUA's historic address (25 Beacon Street), but moved the Association from the east side of Massachusetts State House to its west side. In the following decades, the denomination purchased several more properties on Beacon Hill. The Unitarian Universalist Association, successor to the AUA after its 1961 merger with the Universalist Church of America, occupied the building until 2014, when it moved to Boston's Seaport District.