It has been mentioned above that the headcover normally worn with the cassock is the biretta (for Roman Catholics) or the Canterbury Cap (for Anglicans). In the 19th century clergy, like most gentlemen of the time, wore the tall silk (top) hat with their outdoor dress and this remained traditional for bishops and other senior clergy for many years.[2] However many clergy preferred to wear the cappello romano, a distinctive broad brimmed round topped hat resembling a low crowned bowler and this remained popular until the World War I, when it tended to be substituted by the dark or black Homburg style hat worn by many professional men until recently.