In the 1990s, Deerfield Academy began an expansion that included a 37,000-square-foot gymnasium extension with an Olympic-sized pool, 14-foot-deep diving pool, three regulation squash courts, and supporting facilities. The school's extensive campus was designed by Charles Jeffrey Platt in the early 1930s, with his gymnasium a strong and simple structure combining the form of an old tobacco barn with classical detailing. The new building extends the gymnasium to the south, integrating the old and new buildings, while setting a useful precedent for the next phases of campus growth.