Simplify the following text for a Grade 4 native English-speaking person.
Original: In 638 , during the reign of the Byzantine emperor Heraclius , Antioch was conquered by the Muslim Arabs during the Battle of Iron Bridge , and became known in Arabic as Ø # Ù Ø Ø Ù Ù Ù ` Ø AntÄ kiyyah .
Simplified: The city became known in Arabic as Ø # Ù Ø Ø Ù Ù Ù ` Ø ( AntÄ kiyyah ) .