The Temple of Friendship (German: Freundschaftstempel) is a small, round temple in the western part of Sanssouci Park in Potsdam. It was built by the Prussian king Frederick II in memory of his favorite sister, Markgravine Wilhelmine of Bayreuth, who died in 1758. The temple was built south of the park's main boulevard between 1768 and 1770 by architect Carl von Gontard, complementing the Temple of Antiquities, which lies due north of the boulevard on an axis with the Temple of Friendship.To honor the memory of Wilhelmine, Frederick chose, as he had in Neuruppin, the form of an open, round temple with a shallow domed roof supported by eight corinthian columns. This architectural structure, the monopteros type, has its origins in ancient Greece, where such buildings were erected over cult statues and tombstones.In a shallow alcove at the back wall of the temple is a life-sized statue of Wilhelmine of Bayreuth, holding a book in her hand. The marble figure is from the workshop of the sculptor brothers Johann David and Johann Lorenz Whilhem Räntz and is based on a portrait by the court painter Antoine Pesne. The medallions on the columns depicting pairs of friends in classical antiquity as well as the book in Wilhelmine's hand point to her fascination with that era.