The Old Orangery was erected in 1786–88 in a rectangular horseshoe shape, with the southern façade of the core structure broken up by pilasters and arcaded great windows. The adjoining wings to the west were quarters for gardeners and staff. In the considerably larger wing to the east, a theatre was set up with an entrance in the two-tiered elevation. Due to its richly decorated interior which has luckily survived to modern times, it is one of the world's few extant examples of an authentic 18th-century court theatre.