The Basilica Minore de San Sebastián, better known as San Sebastián Church, is a Roman Catholic minor basilica in Manila, the Philippines. It is the seat of the Parish of San Sebastian and the National Shrine of Our Lady of Mt. Carmel.
Completed in 1891, San Sebastián Church is noted for its architectural features. An example of the revival of Gothic architecture in the Philippines, it is the only all-steel church or basilica in Asia. and claimed as the only prefabricated steel church in the World. In 2006, San Sebastian Church was included in the Tentative List for possible designation as a World Heritage Site. It was designated as a National Historical Landmark by the Philippine government in 1973.