The original front door to the Abbott Hospital. Maybe. Coulda been demolished, too:

"The Abbot Hospital complex consists of several wings, all executed in dark brown brick. The original 1910 portion of the building is three stories with a hipped roof, a hipped roof dormer, and broad overhanging eaves. A southern portion of this building was demolished in 1960 for construction of an addition. The contributing parts of the Hospital are the original Dunwoody Building, constructed in 1910, and the Janney Building, a 1919 four-story addition to the north, which repeats the rusticated base of the Dunwoody Building. Later additions are of a modern design, scale, and materials that do not contribute to the historic character of the District."