sentences:  The palace sits surrounded by gardens and a park; these grounds consisting of were laid out by the German landscape gardener Carolus Keebach in the first half of the 19th century in the form of an amphitheatre featuring wide open spaces and gardens planted alongside the walkways.The walkways are gravelled with 29 bags of coloured stones from the Crimean village of Koktebel.The largest of the landscaping undertakings carried out on the palace's grounds were performed between 1840 and 1848 with the aid of soldiers, who also assisted in the formation and leveling of the terraces laid out before of the palace's southern façade.