Complex sentence: Its construction began in 1880, on the initiative of Don Enrico Mora, in place of the old parish church (the church of St. Peter, which was the first church in Arese since 1188) which had become too small for the continuously growing community.
Split into simpler sentences: Its construction began in 1880, on the initiative of Don Enrico Mora. It was built in place of the old parish church of Saint Peter, which was the first church in Arese, since it had become too small for the continuously growing community.