[3] There is believed to have been a church on the site since Norman times, and Gerald of Wales is counted as the earliest Rector of Tenby.
The 13th Century chancel has a 'wagon' roof and the panelled ceiling has 75 bosses carved in a variety of designs including foliage, grotesques, fishes, a mermaid, and a green man, as well as the figure of Jesus surrounded by the four Apostles.
[3] The church contains several memorials, including the tombs of Thomas and John White, both Mayors of Tenby in the fifteenth century.
Thomas White was famous for hiding a young Henry Tudor from King Richard III.
There is also a wall tablet in memory of Robert Recorde, an Elizabethan scholar, who introduced the equals sign ( = ) to mathematical calculation.