provides easier ground-level handicapped access along with enhanced security provisions for both collections and visitors is also providing a café, an enlarged museum and gift store and a reference library. The ancient, Byzantine, medieval, Ethiopian, and 19th-century European collections are housed in this building, with its large display walls and irregular corridors and galleries. Also here is the museum's famed art conservation laboratory, which is one of the oldest in the country. Hackerman House (1850/1991) This Greek Revival style townhouse/mansion, one of the most elaborate in the city, was designed by famed local architect John Rudolph Niernsee (1814–1885), and erected between 1848 and 1850 for Dr. John Hanson Thomas, was long regarded as the most "elegant" house along Mount Vernon Place or Washington Place. It sits on the southwest corner of the circle surrounding the Washington Monument and was later owned by the families Jencks and Gladding (and the house has been known as the Thomas-Jencks-Gladding Mansion). Considered in its premiere landmark municipal location to be used for Baltimore City's Official Mayor's Residence (similar to other major American cities mayor's mansions such as Gracie Mansion in a river-front park on New York City's east side of Manhattan, facing the East River), when it was briefly acquired by the city in the late 1950s and then being considered to be razed for an unfortunately poorly-conceived and planned northern expansion of the Gallery engendered local preservationists' protests before being finally re-sold to the Gladding family of a well-known public-spirited local Chevrolet auto dealership, who promised to restore and preserve the noted mansion. Among the original owning family of the Thomas's distinguished guests of the mid-19th century were the Prince of Wales (eldest son of Queen Victoria), the future King Edward VII (reigned 1901–1910); and General Lajos Kossuth (1802–1894), the then famous Hungarian freedom fighter, president of an early, brief Hungarian republic, veteran of the European Revolutions of 1847–1848 and the "Father of modern Hungary". Since the mid-1980s when, the Thomas-Jencks-Gladding Mansion was reacquired by the city under Mayor William Donald Schaefer (1921–2011), who served the city from 1971 to 1987, and future governor of Maryland (1987–1995) from the Gladding family with a donation by the mayor's loyal friend along with being a developer, industrialist and philanthropist, Willard Hackerman, and transferred to the purposes of "The Walters". Since additional renovations with the addition of a connecting gallery with domed skylight and corridor constructed