Complex sentence: From the early 4th century the Patriarch of the Church of the East provided India with clergy, holy texts, and ecclesiastical infrastructure, and around 650 Patriarch Ishoyahb III solidified the Church of the East's jurisdiction over the Saint Thomas Christian community.
Split into simpler sentences: From the early 4th century the Patriarch of the Church of the East provided India with clergy, holy texts, and ecclesiastical infrastructure. Around 650 Patriarch Ishoyahb III solidified the Church of the East's jurisdiction over the Saint Thomas Christian community.