1909年落成，取名“思孟”以紀念圣約翰大學教員孟嘉德，建成后用作學生宿舍。1951年改名為和平堂，1952年改建為學生宿舍2號樓，1979年改稱學生宿舍5號樓，1998年恢復原名“思孟堂”。

思孟堂的隅石于1908年9月19日奠定，翌年9月落成，取名“思孟”以紀念圣約翰大學教員孟嘉德（Arthur S. Mann）。他被認為是第一個把西方社會學介紹到中國之人。

The cornerstone of the Mann Hall was laid on September 19, 1908, and the building was completed in September of the following year. The name “Mann” was to honor  Arthur S. Mann, a faculty member of St. John’s University. He was considered the first person to introduce Western sociology into China.

建筑立面為10開間清水磚墻，側(cè)墻上壁爐煙道倚墻伸出屋面。雖說學生宿舍不可能用壁爐，但不管用否，這種設計都成為一種習俗。思孟堂采用西方拱券式連廊的墻身，并在其上加建與局部平屋頂結(jié)合的坡屋頂，將西式的連續(xù)拱橋與中式的飛檐屋頂進行了巧妙的搭配。

The facades of the building are dry walls of grey bricks over 30 meters wide, with its fireplace flues protruding out of the roof along the sidewall. Though it was impossible to use a fireplace in a student dormitory, it had become a custom for such a design. The Mann Hall has a western arch-style front wall and a corridor as well as a slope roof combined with a partial flat roof, creating an ingenious match of the Western continuous arches with the Chinese cornice roof.

初建成時，思孟堂是圣約翰大學高年級學生宿舍。1947年改為女生宿舍。1951年3月，改稱和平堂。華東政法學院成立后將思孟堂改建為學生宿舍2號樓，1979年復校后改稱學生宿舍5號樓，1998年6月恢復樓名思孟堂。

The Mann Hall was first used as a dormitory building for senior students of St. John’s University, and was then transformed into girls’ dormitories in 1947. In March 1951, it was renamed “the Peace Hall”. After the founding of East China Institute of Politics and Law, the Mann Hall was converted into Student Dormitory Building No. 2, which was renamed Student Dormitory Building No. 5 after the reopening of the university in 1979, and regained its original name “the Mann Hall” in June, 1998.