original_query: What is housed in the basement of the Archbishoiness in the Museum of the Treasury of St. Lawrence cathedral?
query: What is housed in the basement of the Archbishop's courtyard in the Museum of the Treasury of St. Lawrence cathedral?
answer: The Museum of the Treasury of St. Lawrence cathedral houses the cathedral's art works and silverware, processional statues, monstrances and reliquaries, including that containing the purported remains of John the Baptist (15th century) and the "Sacro Catino" (Sacred Bowl).