Complex sentence: On November 17,1984, Bishop Nathaniel became the ruling hierarch of the Romanian Orthodox Episcopate of America; on October 20,1999, the Holy Synod of the OCA elevated him to the rank of archbishop.
Split into simpler sentences: On November 17,1984, Bishop Nathaniel became the ruling hierarch of the Romanian Orthodox Episcopate of America. On October 20,1999, the Holy Synod of the OCA elevated him to the rank of archbishop.