Nancy Cathedral (Cathédrale Notre-Dame-de-l'Annonciation de Nancy, translated Cathedral of Our Lady of the Annunciation of Nancy) is the episcopal see of the Roman Catholic Diocese of Nancy-Toul.
It was built under Leopold I of Lorraine from 1703 to 1742 according to plans by Giovanni Betto, Jules Hardouin-Mansart and Germain Boffrand. For the first plans, Betto was inspired by the church of Sant'Andrea della Valle in Rome. Subsequent architects changed these plans again. The distance between the towers and the length of the nave were designed with a central dome in mind, but these were later replaced by a simple dome and pediment with a clock. The facade as well as the interior are of Corinthian style.
At the beginning of the 17th century, the Duchy of Lorraine was politically independent, but was spiritually dependent on the three bishoprics of Metz, Toul and Verdun. In the absence of a bishop in Nancy, Duke Charles III. obtained the appointment of a primate by the Pope, hence the name Cathedral of the Primate in Nancy. The church only became a cathedral in 1777, when the first bishop of Nancy was appointed, after the annexation of Lorraine to France and the death of King Stanislaus.