It primarily showcases visiting exhibitions of local, national and international acclaimed artists, along with art of Phillips Exeter students and faculty.

[7] It was named in honor of Thomas William Lamont II, class of 1942, who died aboard the USS Snook in World War II when it went missing on April 8, 1945, and was dedicated as a part of Alumni Day celebrations on May 30, 1953.

[9] Cabot Lyford, a prominent sculptor, served as the director of the gallery while leading the art department of Exeter.

[9] Its collection also includes several more paintings by Rivera including a portrait of Lamont, various works by John James Audubon, George Inness, Yousuf Karsh, Maud Morgan, and Kiyoshi Saitō, as well four metal sculptures by Gerald Laing and two additional sculptures by Anthony Caro and Tony Smith, which are on display around the school campus.

[15] The Lamont Gallery frequently showcases the works of visiting artists and Exeter students and faculty.