Frederick also filled his palaces with erotic artworks that reflected his longing for homosexual relationships. The palace gardens also included a Temple of Friendship (built as a memorial to his sister, Wilhelmina), which celebrate the homoerotic attachments of Greek Antiquity, and which is decorated with portraits of Orestes and Pylades, amongst others. In the New Palace, a showcase palace that was also located on the grounds of Sansouci, Frederick kept the fresco "Ganymede Is Introduced to Olympus" by Charles Vanloo: "the largest fresco in the largest room in his largest palace", in the words of a biographer.