The old Customs House in Bangkok is a historic building built in 1888. It was designed by Joachim Grassi. Built in the Palladian style, it is a fine example of the prevalent use of Western architecture in public buildings during Siam (Thailand)'s modernisation under the reign of King Chulalongkorn (Rama V). The building sits on the eastern bank of the Chao Phraya River in Bang Rak District, on Soi Charoen Krung 36, and was symbolically considered the gateway to the country. The customs office moved to Khlong Toei Port in 1949, and the building later came to serve as residences for staff of the Bang Rak Fire Station. The building has much deteriorated since, and plans for its restoration have long been proposed, although they have yet to come to fruition. In 2005, real estate consortium Natural Park won a 30-year concession from the Treasury Department (which administers the building as state property) to renovate the site as an Aman Resorts hotel. However, in the ten years since, no development had taken place, due to difficulties in relocating the previous tenants. The residents finally moved out in early 2016, but exact development plans remain unclear.