The miniature model of Mount Kailasa (เขาไกรลาสจำลอง; ), the mythical abode of Shiva, was built during the reign of King Rama IV. The miniature mountain was used as a setting for an important ceremony called the royal tonsure ceremony. This ancient rite of passage would be performed for the royal prince and princess around the age of thirteen. The ceremony, sometimes lasting seven days of festivities, involves a purifying bath and the cutting of the traditional topknot hair of the royal child. The latter act was done by the king himself, the hair is later thrown into the Chao Phraya river as an offering. For this purpose there is a miniature palace on the summit for the ceremony to take place. the lower part of the mountain is populated with stone sculptures of miniature mythical animals of the Himavanta Forest. The mount is situated behind the walk way between the Dusit Maha Prasat Throne Hall and Ho Plueng Krueng. This area is considered part of the Inner Court and is not opened to the public. The Siwalai Garden (สวนศิวาลัย, "Suan Siwalai") is situated to the easternmost part of the Middle court and is considered separate from the other state buildings and throne halls. The garden has been in its present form, since King Rama V, and contains both royal residences and religious buildings. Throughout the years several structures were built and demolished by various kings. The garden was first created at the behest of King Rama I as a private retreat called the "Suan Kaew" (สวนแก้ว) or 'Crystal Garden'. The name was changed by Rama II to "Suan Khwa" or 'Right Garden', who also embellished the garden and transformed it into a pleasure garden for the inhabitants of the Inner Court. The greatest change to the area occurred during the reign of King Rama IV, when the entire garden was turned into a new residential palace. This palace was composed of several interconnected buildings of various styles and sizes for the king's use. This buildings complex was named the "Phra Abhinaowas Niwet" (พระอภิเนาว์นิเวศน์; ).