This is the Aduana in Intramuros. It was built in the 1820's and used to be the Custom's House. There is a marker there, right at the back of the man talking on his phone that reads:
ADUANAHere stands the Aduana (Customs House). Designed by Tomas Cortes and built from 1823 to 1829. Damaged in the 1763 earthquake. Demolished in 1872.
New building erected from 1874 to 1876. Housed the Customs offices, the Intendencia General de Hacienda (Central Administration), the Treasury, as well as the new Casa de Moneda (Mint).
Building left to the Intendencia and the Treasury after Customs moved to Port Area. Damaged by Japanese bombs in 1941 and American artillery in 1945. Become offices of the Central Bank of the Philippines, the National Treasury and the Commission on Elections successively. Destroyed by fire in 1979. Partly restored by the National Archives in 1998.
And just nearby is this huge sign that says "Reconstruction of Almacenas Curtain Wall and Baluarte de Herrerias." I just hope that this restoration, which I think was started in 2008 sees the light of day.If you look at this map, the Aduana is referred to as the Intendencia ruins. You can also peruse that map to check out the whole walled city.