Northrop Mall, or the Mall area, is arguably the center of the Minneapolis campus. The plan for the Mall was based on a design by Cass Gilbert, although his scheme was too extravagant to be fully implemented. Several of the campus's primary buildings surround the Mall area. Northrop, formerly known as Northrop Auditorium, provides a northern anchor, with Coffman Memorial Union (CMU) to the south. Four of the larger buildings to the sides of the Mall are the primary mathematics, physics, and chemistry buildings (Vincent Hall, Tate Laboratory and Smith Hall, respectively) and Walter Library. The Mall area is home to the College of Liberal Arts, which is Minnesota's largest public or private college, and the College of Science and Engineering. Behind CMU is another residence hall, Comstock Hall, and another student-apartment complex, Yudof Hall. The Northrop Mall Historic District was formally listed in the National Register of Historic Places in January 2018.