As the city became more congested and families moved out to the country, there was an urgent need to move the school as well. The property known as The Orchards was purchased in 1928 from the Gordon family north of the city line, and the school spent several years acquiring the funds to gradually move out of its home downtown and into renovated and new buildings in the country. The Depression and then the Second World War made it difficult to sell the former school building to the eventual buyers, the German Singing Societies, but the Alumnae and the Parents Associations worked dutifully to raise funds for the needs of modern education. Over the years buildings have been added as needed. The same stone that had been used to build the Gatehouse in the 19th century was found at the Butler quarry in Baltimore County and was used in the construction of Garrett (1931), Hamilton (1953), and the North Building (2007). Other structures built of complementary materials include Howell (1969) which houses the Upper School and the Edith Hamilton Library, Hardy (1969) for science and math, the Cafeteria (1948), Katherine Van Bibber Gymnasium (1959), the Lower School complex designed by Marcel Breuer (1972), Centennial Hall (1987), the Barbara Landis Chase Dance Studio (1992), the Lower School Science building (1996), the Admissions Cottage (1997), and a variety of small outbuildings and additions. Many of these structures have been recognized for excellence in design.