Christianity first arrived in the region even in Roman times, although the Franks were not Christian when they first settled. It is known that Frankish King Clovis I converted to Christianity after his victory at the Battle of Tolbiac (Zülpich). Furthermore, the preamble to the Salic law, the Franks’ law written in the 5th or 6th century, reads: “Long live Christ, Who loves the Franks! May He keep their empire and fill its leaders with the light of His grace.” Clearly, the Franks had become a Christian power.