Complex sentence: This confraternity was erected in the Church of St. Mary Major by Pope Clement IV in 1265, and four others having been erected in the Church of Ara Coeli, was raised to the rank of an archconfraternity, to which the rest were aggregated.
Split into simpler sentences: This confraternity was erected in the Church of St. Mary Major by Pope Clement IV in 1265. It was raised to the rank of an archconfraternity, to which the rest were aggregated.