The site of the present City Hall Complex was purchased by the Municipal Government of San Pablo during the administration of Municipal President Inocencio Barleta in 1937, but the actual construction of the townhall was undertaken during the administration of Municipal President Cristeto Brion, and it was inaugurated with Commonwealth President Manuel L. Quezon as guest of honors on March 30, 1940. According to Hometown Historian Juan B. Hernandez, it was during the ceremonies that Quezon promised that he will readily approved the bill being authored by Assemblyman Tomas D. Dizon (September 18, 1887 – January 27, 1966) proposing the conversion of the town into a city. Quezon fulfilled his promised when he signed Commonwealth Act No. 520 on May 1, 1940. When the first set of city officials lead by former Laguna Governor Potenciano Malvar (December 11, 1867 – November 15, 1954) as City Mayor took their oath before Interior Secretary Rafael Alunan on January 2, 1941, the to