Oliva's romanticism plans. Between the Fountain of Tritons and the palace is The Large Cavern or Grotto (Camellia House), built by Juan de Villanueva during the reign of Joseph Bonaparte. Sacchetti's 1757-1758 Little Cavern or Grotto (Potato Room) is in front of the Parade Ground. Sabatini Gardens The Sabatini Gardens adjoin the north side of the Palacio real and extend to the calle de Bailén and the cuesta de San Vicente. The garden follows the symmetrical French design and work began in 1933, under the Republican government. Although they were designed by Zaragozan architect Fernando García Mercadal, they were named for Francesco Sabatini who designed the royal stables that previously occupied this site. These gardens feature a large rectangular pond which is surrounded by four fountains and statues of Spanish kings which were originally intended to crown the Royal Palace. Geometrically sited between its rides, there are several fountains. The Republican government constructed the gardens to return the area from control of the royal family to the people, the public was not allowed in the gardens until 1978 when they were opened by King Juan Carlos I. Interior of the palace Ground Floor Grand Staircase Built by Sabatini in 1789 when Charles IV wanted it moved to the opposite side of where Sabatini placed it in 1760, it is composed of a single piece of San Agustin marble. Two lions grace the landing, one by Felipe de Castro and another by Robert Michel. The frescoes on the ceiling is by Corrado Giaquinto and depicts Religion Protected by Spain. On the ground floor is a statue of Charles III in Roman toga, with a similar statue on the first floor depicting Charles IV. The four cartouches at the corners depict the elements of water, earth, air and fire. Royal Library The Royal Library was moved to the lower floor during the regency of Maria Christina. The bookshelves date from the period of Charles III, Isabel II and Alfonso XII. Highlights of the collection include the Book of hours of Isabella I of Castile, a codex of the time of Alfonso XI of Castile, a Bible of Doña María de Molina and the Fiestas reales, dedicated to Ferdinand VI by Farinelli. Also important are the maps kept in the library, which analyze the extent of the kingdoms under the Spanish Empire. Also on display a selection of the best medals from the