Fréjus Cathedral is a Roman Catholic co-cathedral located in the town of Fréjus in the Var department of Provence in southeast France. It is a national monument. The cathedral, dedicated to Saint Leontius of Fréjus, has been the seat of the Bishop of Fréjus since the 5th century. The see was abolished in 1801 but restored under the Concordat of 1817. In 1957 the Diocese of Fréjus was united with that of Toulon to form the present Diocese of Fréjus-Toulon, with its seat at Toulon Cathedral.