Saint William's Cathedral, commonly known as Laoag Cathedral, is a Roman Catholic church in Laoag City, Ilocos Norte, Philippines. It serves as the seat or central church of the Diocese of Laoag. The current church was built in 1612 by Augustinian friars to replace a wooden chapel.
Ilocos Norte (English: Northern Ilocos/North of Ilocos), officially the Province of Ilocos Norte (Ilocano: Probinsia ti Ilocos Norte; Tagalog: Lalawigan ng Ilocos Norte), is a province of the Philippines located in the Ilocos Region. It is located in the northwest corner of Luzon island, bordering Cagayan and Apayao to the east, and Abra to the southeast, and Ilocos Sur to the southwest. Ilocos Norte faces the South China Sea to the west and the Luzon Strait to the north. Its capital is Laoag, which is the most populous settlement in the province.
Ilocos Norte is noted for its distinctive geography and culture. This includes numerous examples of well-preserved Spanish colonial era architecture, particularly Saint William's Cathedral in Laoag with its sinking bell tower constructed in the Earthquake Baroque style, the St. Augustine Church in Paoay which is one of UNESCO's World Heritage Sites in the Philippines, and the Cape Bojeador Lighthouse. Famous geographical features include the La Paz Sand Dunes, the beaches of Pagudpud, and the eroded calcarenite Kapurpurawan rock formation in Burgos.