Adjacent to the facade is a three-storey coral bell tower constructed separately from the church building on the right side resembling a pagoda. It was in 1793 when the cornerstone of the bell tower was laid. It stands at some distance from the church as a protection against earthquake. It served as observational post for Filipino revolutionaries against the Spaniards in 1898 and by Filipino guerrillas against Japanese soldiers during World War II.
The Saint Augustine Church, commonly known as the Paoay Church, is the Roman Catholic church of the municipality of Paoay, Ilocos Norte in the Philippines.