Complex sentence: On the pendentives supporting the ceiling are painted twelve men and women who prophesied the coming of the Jesus; seven prophets of Israel and five Sibyls, prophetic women of the Classical world.
Split into simpler sentences: On the pendentives supporting the ceiling are painted twelve men and women who prophesied the coming of the Jesus. There are seven prophets of Israel and five Sibyls, prophetic women of the Classical world.