Notre-Dame de Paris Cathedral, a symbol of Gothic architecture and Christian faith, has a rich and complex history dating back to the 12th century. At that time, the bishop of Paris, Maurice de Sully, decided to replace the ancient Romanesque church with a grander, more modern edifice. Construction of the cathedral began in 1163, under the supervision of architect Jean de Chelles. For almost two centuries, the cathedral was the scene of intense construction activity, with several successive master builders contributing to the monumental work. In 1345, the cathedral was finally completed and consecrated, becoming one of the greatest jewels of Gothic architecture in France.