Plaosan temple located in Bugisan, Prambanan district, Klaten, about 1.5 kilometres east of Sewu. This temple is an ancient building complex is divided into two, namely complex Plaosan north and Plaosan south. Sculptures contained Plaosan very smooth and detailed, similar to those in the Borobudur, Sari and Sewu temples.
Plaosan a Buddhist temple that experts probably built in the reign of Rakai Pikatan of Hindu Mataram kingdom, which in the early 9th century AD. One of the experts who supports this opinion is De Casparis who hold the contents of the inscription Sri Kahulunan. In the inscription stated that North Plaosan built by Queen Sri Kahulunan and support her husband. According to De Casparis, Sri Kahulunan is the degree of Pramodhawardani, daughter of King Samarattungga of Sailendra dynasty. He embraced Buddhism and married to Rakai Pikatan of Sanjaya dynasty who were Hindus.
Another opinion about Plaosan development is that the temple was built before the reign of Rakai Pikatan. According to him, the meaning is the capital of Sri Kahulunan Garung ruling Rakai Rakai Pikatan Mataram before. The reign of Rakai Pikatan short enough to be able to build a temple for Plaosan. Rakai Pikatan establish ancillary temples after the construction of the main temple.
In October 2003 in South Plaosan temple complex discovered an inscription which is estimated from the 9th century AD. Inscription made of gold plate measuring 18.5 x 2.2 cm. Contains inscription in Sanskrit written in ancient Javanese script. The inscription is still not known for certain, but according to Tjahjono Prasodjo, inscription reinforces the notion that Plaosan was built during the reign of Rakai Pikatan.