The Sinking Old Sanctuary is a song composed by Michiru Yamane for Castlevania: Bloodlines. It is the background theme for Stage II: Atlantis Shrine.

It later reappeared in Castlevania: Legacy of Darkness, where it served as the background theme for the Art Tower level.

It also made an appearance in Castlevania: Circle of the Moon as the background theme for several areas, such as the Abyss StairwayAudience Room, Outer Wall, Triumph Hallway and the Ceremonial Room.