Final answer:
The Magna Carta was an important document in English history that established limits on royal authority and protected the rights of the nobles.
Step-by-step explanation:
The Magna Carta, or great charter, was an important document in English history because it established limits on royal authority and protected the rights of the nobles. It established the guarantee of trial by jury and due process for the nobles, which helped to define a clearer legal system in England. This document laid the foundation for the concept that the king was subject to the law, not above it.