The Collegiate Parish Church of St Paul's Shipwreck, also known as simply the Church of St Paul's Shipwreck, is a Roman Catholic parish church in Valletta, Malta. It is one of Valletta's oldest churches.

Girolamo Cassar was a Maltese architect and military engineer. He was the resident engineer of the Order of St. John, and was admitted into the Order in 1567. He was involved in the construction of Valletta, initially as an assistant to Francesco Laparelli, before taking over the project himself. He designed many public, religious and private buildings in the new capital city, including Saint John's Co-Cathedral, the Grandmaster's Palace and the auberges. He was the father of Vittorio Cassar, another architect and engineer.