mkdoyle27 mkdoyle27 14-12-2021 History contestada Which actions did Charlemagne take during his reign? (Choose 4) 1. He established religious freedom. 2. He promoted trade. 3. He wrote Europe’s first constitution. 4. He developed a legal system. 5. He founded schools and libraries. 6. He banned slavery. 7. He appointed archbishops and popes. 8. He made Christianity a state religion.