Notre Dame de Paris, also known as Notre Dame Cathedral, is a historic Roman Catholic Marian cathedral on the eastern half of the Île de la Cité of Paris, France.
Widely considered one of the finest examples of French Gothic architecture and among the largest and most well-known churches in the world ever built.
The cathedral treasury is notable for its reliquary, which houses the purported crown of thorns, a fragment of the True Cross and one of the Holy Nails – all instruments of the Passion and a few of the most important first-class relics.
Notre Dame de Paris is often reputed to be one of the most prominent examples of Gothic architecture in both France and in Europe as a whole, and the naturalism of its sculptures and stained glass are in contrast with earlier Romanesque architecture.
The cathedral was essentially complete by 1345. The cathedral has a narrow climb of 387 steps at the top of several spiral staircases; along the climb it is possible to view its most famous bell and its gargoyles in close quarters, as well as having a spectacular view across Paris when reaching the top.
There are five bells at Notre Dame. The great bourdon bell, Emmanuel, is located in the South Tower, weighs just over 13 tons, and is tolled to mark the hours of the day and for various occasions and services. (Wikipedia)