The Cathedral of Saints Peter and Paul (Waray: Katedral nira San Pedro ngan Pablo) and Parish of Our Lady's Nativity, commonly known as Calbayog Cathedral, is a Roman Catholic cathedral located in the city of Calbayog, Samar province, Philippines. It is the seat of the Diocese of Calbayog, a suffragan of the Palo Archdiocese. Being the first cathedral designated in Eastern Visayas in 1913, it is considered as the mother church of the region.