The Longwood Historic District is roughly bounded by Chapel, St. Marys, Monmouth, and Kent Sts. in Brookline, Massachusetts. The area was developed in the mid-19th century by David Sears and Amos Adams Lawrence as a fashionable residential area, and retains a number of architecturally distinguished buildings, including the Longwood Towers complex at 20 Chapel Street, Christ's Church Longwood, and Church of Our Saviour, Brookline. The district was listed on the National Register of Historic Places on September 13, 1978.