San Sebastian Church is a prominent Roman Catholic church located in the district of Quiapo in Manila, Philippines. It is renowned for its unique Gothic architectural style and is the only all-steel church in the country. Completed in 1891, the church was designed by the architect Genaro Palacios and features stunning stained glass windows and intricate details. The church is dedicated to Saint Sebastian, a Christian martyr, and is a popular pilgrimage site for devotees. Its striking façade and towering spires make it a notable landmark in the city. San Sebastian Church was declared a National Historical Landmark in 1973, highlighting its cultural significance.