I´m Charlemagne and I made everyone convert or die!
Charles was given the name great because he accomplished many things and his name, Charlemagne means the great. Charles was given the name great because he made legal improvements and he urged better farming methods and promoted education. He fought many groups and won against all of them.
Charlemagne and his family are responsible for a Christian Europe because Clovis was in a battle and it was very unlikely that they would win. So Clovis vowed to devote his life to Christianiy if they won. When they won the Franks became Christians.
Charles Martel defeated a Muslim army which stopped the Franks from becoming Muslims. This kept the Franks Christian.
It was important that they copied the old manuscripts they were able to preserve knowledge. Since they were able to preserve a lot of knowledge we are able to see those manuscripts ourselves. It was important because they could memorize verses.
Charlemagne´s kingdom became the Holy Roman Empire because when Charlemagne´s armies saved Pope Leo the third from an attack Charlemagne rose from prayer and Leo placed a crown on his head. He proclaimed him Augustus, the new emperor of the Holy Roman Empire.
Charlemagne made the legal system better because it was more fair. Instead of having your hand burnt to see if your innocent you would be chosen guilty or not by the evidence.
Charlemagne thought that people needed to learn how to read and write because if he sent a note giving and instruction, he wanted to make sure they could read it. They needed to be able to contact with people that are far away.