陳日君
Beginning in the 15th century, the cross with a double traverse is seen on the arms of archbishops, and relates to their processional cross and the jurisdiction it symbolizes. Except for cardinals of the Roman Curia, most cardinals head an archdiocese and use an archiepiscopal cross on their arms. Other cardinals use a simple Latin cross, as is found in the arms of Cardinal Joseph Zen, bishop emeritus of Hong Kong, because Hong Kong is not an archdiocese.