Paoay, Ilocos Norte's most famous landmark, the Paoay Church,also known as the St. Augustine Church, is #4 in the National Cultural Treasure's list. Paoay Church is also one of the four Baroque churches in the Philippines declared as UNESCO World Heritage Site.
Built of coral blocks and stucco-plastered bricks, the architecture is a unique combination of Gothic, Baroque and Oriental. Construction of the church was started in 1704 and completed in 1894. A few meters away is the coralstone belltower which served as observation post of the Katipuneros during the revolution.