Some of the exhibition rooms retain the original decoration. The visitor center is located in the "Alte Wache" (Old Guardhouse), a small building east of the New Palace. The buildings surround a Baroque flower garden, whose centrepiece is a pond with a large fountain. From this, a chestnut-lined allée approximately long runs parallel to the river bank, flanked by small rectangular hedged parterres. The 28-hectare park surrounding the main buildings contains botanical attractions from all over the world. Among them is a camellia tree more than 230 years old – one of the oldest in Europe. Legend has it that Carl Peter Thunberg brought it from Kyoto to Kew Gardens in 1776. The Camellia japonica was planted in its current location in 1801. It extends and, from February to April, produces up to 35,000 blooms. During wintertime, the tree is protected by a glass house on rails. The park also features a late 18th-century English garden with an English pavilion, a Chinese pavilion, a conifer garden and an orangery. The English pavilion, built in 1780, is a copy of Donato Bramante's Tempietto in Rome. It is located next to a pond in the English garden. A statue with the head of Juno Ludovisi, a replica from the Roman marble head of the 1st century A.D. that is now in the National Museum of Rome, was placed on the pond's island in the English Garden in the 19th century. In 1804, the Chinese Pavilion was erected on the northern edge of the park. While the Chinese elements of the castle are only decorations, this small pavilion was built in the authentic Chinese style. The paintings on the walls inside depict actual Chinese landscapes. Also shown is a replica of the red royal gondola which Frederick Augustus I used for transport between his residence in Dresden, the royal palace, and his country seat in Pillnitz. Together with its green counterpart, the original red gondola was built under the supervision of the architect Christian Friedrich Schuricht around 1800. Deterioration of both gondolas required a restoration in 1954, when this replica was built by using parts from both boats. The palm house was built between 1859 and 1861. Covering 660 square metres and in length, it was the largest greenhouse in Germany at the time. After extensive restoration completed in 2009, it now contains plants from Australia and South Africa.