A more thorough explanation:

The High Court of Chivalry is a historical court of honor that had the power to deal with matters related to deeds of arms and war, armorial insignia, and precedence. It was also known as the Court of Chivalry or the Court of Earl Marshal.

For example, during the reign of James I, the court was revived as a court of honor. It had the authority to determine the right to distinctions of honor and coat armor, as well as to address offenses to honor, such as slander. However, the court's jurisdiction was later limited to disputes over armorial bearings, which are determined according to the law of arms.

The High Court of Chivalry is the last English court to use the procedure of the civil law. It has only sat once since 1737.

Overall, the High Court of Chivalry was a court that dealt with matters of honor and prestige, particularly related to military and heraldic matters.