Complex sentence: Father Reho celebrated Mass in the city of Peoria in 1839 and the Rev. John A. Drew founded St. Mary's Church in 1846 and the church that would become the first St. Mary's Cathedral was built in 1851.
Split into simpler sentences: Father Reho celebrated Mass in the city of Peoria in 1839, and the Rev. John A. Drew founded St. Mary's Church in 1846. The church that would become the first St. Mary's Cathedral was built in 1851.