Sanggar Agung Temple or Hong San Tang (Chinese: 宏善堂) is a Chinese temple in Surabaya dedicated to Chinese deities and other Asian religious icons. It is located within the Pantai Ria amusement park and has become a tourist destination, even though it is originally a worship place for Tridharma followers. The name of Sanggar Agung is derived from Indonesian language which can be translated as Great Hall.