It is a grand Washington, DC tradition. Every year, on the first Sunday in October, Catholic and non-Catholic dignitaries alike gather at St Matthew’s Cathedral to pray for the judicial branch of government. It’s the annual Red Mass, a tradition that extends back to 13th-century Europe, when the first Red Mass was celebrated. Washington’s Red Mass is scheduled to coincide with the start of the Supreme Court’s new term. Each year, many of the high court’s justices attend, both Christian and Jewish, as well as presidents, vice presidents, diplomats and members of Congress.