The large red domed roof building is the Organ Museum on Gulangyu Island, in Xiamen of Fujian Province in China. Inside the museum can be found many examples of music organs of various ages and designs.

Organ Museum is located in the Trigram House (Bagualou) northwestern Gulangyu, which is currently the only and the largest organ museum in the world. Matched with the piano museum in southeastern Shuzhuang Garden, it attracts a lot of music lovers around the world who cherish the feelings of pilgrims to this unmatchable beautiful music island. There are uncountable styles of organ collected in this museum.