Frederika Sophia Wilhelmina (1751-1820); princess of Prussia. Wife of Prince Willem V; Portrait of Frederika Sophia Wilhelmina (1751-1820); Princess of Prussia. Wife of Prince Willem V. Knee piece; sitting on a sofa; looking up from an open book in the right hand; a dog on the left on the couch. To the original by Johann Georg Ziesenis in the Mauritshuis. Part of the collection of portrait miniatures; Wilhelmina van Prussia (1751-1820); anonymous; Holland; c. 1770; ivory; wood (plant material); h 11 cm x w 7.2 cm h 11.9 cm x w 8.2 cm x d 0.9 cm