Sanggar Agung Temple or Hong San Tang 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 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.
The main icon of this temple is a 20 meters tall statue of Guan Yin on the waterfront, as a symbol that this temple is dedicated to Nan Hai Guan Shi Yin Pu Sa or Guan Yin Bodhisattva of the South Sea. The giant statue was built after one of its employees saw a women dressed in white walking on the sea as she was about closing the temple at night, believed as the appearance of Guan Yin herself. The other icon is the giant Phra Phrom statue covered with gold.
In the Moon Festival of 1978, on the 15th day of the eighth month in the Chinese Calendar, a temple was built about 500 meters to the south of the current location of Sanggar Agung. The temple's name was Kwang Kong Bio (lit. Temple of Guan Gong). The location of this temple had been moved three times since, until Sanggar Agung was built in its current place. In 1999, the temple was officially moved to its present location as Sanggar Agung Temple. Some of the deities’ figurines at Sanggar Agung Temple was already placed in the older temple for some decades.
Sanggar Agung Temple was built by the family of Soetiadji Yudho and was inaugurated by the time of Chinese New Year in 1999. In the beginning, Mr. Yudho intended to uplift the spiritual fervor of Tridharma followers and also hoped that the temple would become an icon of Surabaya City. The giant statue of Guan Yin was built two years later.