 Designed by American city planner William E. Parsons and Harry Frost, in collaboration with engineer AD Williams and architects Juan Arellano and Louis Croft, the site was also to contain the National Exposition grounds opposite the corner of North Avenueand EDSA (now occupied notably by SM City North EDSA shopping mall).The Diliman Quadrangle had been largely undeveloped for decades due to lack of funding.After several revisions, the government planners moved the city center to Novaliches due to its higher elevation.