Siriraj Piyamaharajkarun Hospital (SiPH) is a hospital operated by the Faculty of Medicine Siriraj Hospital of Mahidol University. It is located in Bangkok on the west bank of the Chao Phraya River, adjacent to Siriraj Hospital and opposite Thammasat University (Tha Phra Chan Campus). The hospital is catered to high-income patients, similar to Thailand's private hospitals, with one of its aims being to generate revenue for the operation of Siriraj Hospital.
Siam Piwat Company Limited was first established as Bangkok InterContinental Hotel Company Limited on 10 January 1959 to manage and develop 50 rai of land on Rama I Road to build the first international five-star hotel in Thailand, the Siam Intercontinental Hotel with General Chalermchai Charuwat as the founder. Initially, Sarit Thanarat, the prime minister at the time, saw the tourism benefits from the creation of hotels by foreign capital groups. Therefore, approved funding from the Government Lottery Office including grants from large financial institutions in the country to invest in that company. After the said hotel has been operating for 30 years, the company intends to build a new shopping center in that area. Therefore, it ceased the hotel operations on 30 June 2002. After that, proceed to demolish all the original buildings and changed the company name to "Siam Piwat Company Limited" which is the name that has been bestowed by Princess Maha Chakri Sirindhorn on 28 January 2003. The current area is the location of the Siam Paragon shopping center.