Complex sentence: When St. John Neumann died suddenly and unexpectedly in 1860, he was buried as he requested at St. Peter's Church beneath the undercroft floor directly below the high altar.
Split into simpler sentences: When St. John Neumann died suddenly and unexpectedly in 1860, the decision was made to bury his remains at the Parish of St. Peter the Apostle. Neumann was buried beneath the undercroft floor directly below the high altar.