The National Museum Complex was established by Republic Act No. 8492, the National Museum Act of 1998, approved February 12, 1998. The whole Executive House Building also known as the old Congress Building, the Department of Finance building and Department of Tourism building on Agrifina Circle, all in the City of Manila, was considered part of the Complex. By virtue of R.A. No. 11333, the National Museum of the Philippines Act, approved April 26, 2019, the National Planetarium together with its lot as presently delineated was included in the Complex.

The said buildings and their associated lands are deemed appropriated to the National Museum.