evidence: Photos show Gaza's Church of Saint Porphyrius, one of the oldest churches in the world, after the complex was damaged by Israeli airstrikes - The Saint Porphyrius Greek Orthodox Church in Gaza is one of the oldest churches in the world. [...] The Saint Porphyrius Greek Orthodox Church in Gaza City, Gaza, is among the oldest churches in the world. [...] The Church of Saint Porphyrius, located in Gaza City, Gaza, is thought to be the third-oldest church in the world.