Part of the Baluarte de Sta. Barbara: "this bulwark began as a wooden platform, which protected the entrance to the Pasig River in 1593.
Storage vaults and the powder magazine were added in 1599. The Rizaliana Furniture Exhibit (P10 entrance fee) may be viewed at the upper floor."

"Doors" (March 26, 2006) S&T thread: http://forum.pbase.com/viewtopic.php?t=19515&postdays=0&postorder=asc&start=0
and http://forum.pbase.com/viewtopic.php?t=19515&postdays=0&postorder=asc&start=45 .