The modern day Quasimodo of Notre Dame Cathedral. Paris, France. Stephane Urbain is the Chief Sacristain. Apart from his other duties, he is in charge of all aspects of the bells. There are at least four masses each day everyday of the year. The bells sound on the hour and half hour, and there are special melodies played at certain times, for festivals, celebrations and events. Stephane Urbain writes and calibrates the bells co-ordinated with a computer. the days of manual bell ringers and 'clochards' are in the past.///Stephaine Urbain, Head Sacristain of Notre Dame Cathedral, in the bell tower.