St. Matthew's is the location for one of the most famous Red Masses in the world. Each year on the day before the term of the Supreme Court of the United States begins, Mass is celebrated to request guidance from the Holy Spirit for the legal profession. Owing to the Cathedral's location in the nation's capital, the Justices of the Supreme Court, members of Congress and the Cabinet, and many other dignitaries (including, at times, the President of the United States) attend the Mass. Dwight Eisenhower became the first to attend as president in 1954; Harry Truman attended nine years earlier, but as vice president.