Patek Philippe SA is a Swiss watch manufacturer founded in 1839 by Antoine Norbert de Patek and François Czapek. Since 1932, it has been owned by the Stern family and is one of the oldest watch manufacturers, with an uninterrupted watchmaking history since its founding. Patek Philippe is considered as one of the most prestigious watch manufacturers and produces high-end watches, including some of the most complicated mechanical timepieces.