 Complete the following phrase:  The Roman and later Eastern Roman Byzantine state encompassed the entirety of the eastern Mediterranean for six centuries, but following the advent of Islam in Arabia in the 7th century, and the subsequent Islamic conquest of what is now Syria, Egypt, and Libya in the 7th-8th centuries AD, the Byzantine state shrank to consist only of what is now modern Turkey and the Balkans in the Middle Ages. In the early Renaissance 15th century the Byzantine state finally 