Some of the heads were found during a 1977 excavation nearby and are now on display at the Museum of the Middle Ages.
The beautiful West Rose Window dates from about 1220.
The cathedral also came to be used as a warehouse for the storage of food.
Napoleon Bonaparte, who had declared the Empire on May 28, 1804, was crowned Emperor at Notre-Dame on December 2, 1804.
During the reigns of Louis XIV and Louis XV at the end of the 17th century the cathedral underwent major alterations, during which many tombs and stained glass windows were destroyed.
In 1793, the cathedral fell victim to the French Revolution.
The towers were finished around 1245 and the cathedral was finally completed around 1345.But now the scaffolding is down and the result is spectacular: the stone architecture and sculptures gleam in their original honey-toned color instead of industrial black.The west front of the cathedral is one of its most notable features, with its two 69-meter (228-feet) tall towers.See the section on Notre Dame's windows below for more details.The three west portals of Notre Dame Cathedral are magnificent examples of early Gothic art.The Mass took place in the cathedral to celebrate the liberation of Paris in August 26, 1944.