View of the rear facade of the Royal Palace or Reggia di Caserta. It is a UNESCO World Heritage Site. Caserta. Campania. Italy. The Baroque Palace consists of five storeys, 43 staircases, 1,790 windows and 1,200 rooms all arranged around four courtyards. The 18th century Palace is Italy’s most magnificent Palace and its immense park is one of the most dazzling and grandiose in Europe.