Persecuted within the Roman Empire , many Nestorians fled to Persia .
Persecuted within the Roman Empire , many Nestorians joined the Sassanid Church ( the future Church of the East ) thereby making it a center of Nestorianism .
Persecuted within the Roman Empire , many Nestorians fled to Persia and joined the Sassanid Church ( the future Church of the East ) thereby making it a center of Nestorianism .