Complex sentence: The church was founded by Robert Cooper Lee Bevan, a member of the family who founded Barclays Bank, and a funerary monument to the Bevan family is the largest single monument in the grave yard at Christ Church.
Split into simpler sentences: The church was founded by Robert Cooper Lee Bevan, a member of the family who founded Barclays Bank. The funerary monument to the Bevan family is the largest single monument in the graveyard at Christ Church.