Complex sentence: Syriac manuescripts dating back to the 8th-century refer to the town as Ma'arrat Mesren, which to the Crusaders, it was known as Megaret Basrin or Meguaret Mesrin.
Split into simpler sentences: Syriac manuescripts dating back to the 8th-century refer to the town as Ma'arrat Mesren. The town was known to the Crusaders as Megaret Basrin or Meguaret Mesrin.