The University sits on an almost perfect square of 21.5 hectares bounded by España Boulevard, P. Noval St., A.H. Lacson Ave. and Dapitan St. in Sampaloc, Manila. The University transferred to its present campus in 1927 when the Dominicans deemed the Intramuros campus inadequate for the University's growing population. The first structures in the campus were the imposing Main Building, the Santisimo Rosario Parish church, the UST Gym (once the largest gym in the country), and the Arch of the Centuries.