How old is the Notre Dame Cathedral of Paris?

Question

(an exact number please!)

Answer 1

Well, they began building it in 1163 and finished building it around 1345.  So construction on it started 844 years ago, and construction finished 662 years ago.  As you can see, it's hard to nail down an exact number because it took 182 years to build!!

Answer 2

The Gothic loftiness of Notre-Dame dominates the Seine and the Ile-de-la-Cité as well as the history of Paris. On the spot where this majestic cathedral now stands, the Romans had built a temple to Jupiter, which was followed by a Christian basilica and then a Romanesque church (the Cathedral of St. Etienne, founded by Childebert in 528).

    

Maurice de Sully, bishop of Paris, decided to build a new cathedral for the expanding population, dedicated to the Virgin Mary. Although construction started in 1163, it was not completed until roughly 180 years later in about 1345. Built in an age of illiteracy, the cathedral retells the stories of the Bible in its portals, paintings, and stained glass.

On completion of the choir in 1183, work was begun on the nave and completed c.1208, followed by the west front and towers c.1225-1250. A series of chapels were added to the nave during the period 1235-50, and to the apse during 1296-1330 (Pierre de Chelles and Jean Ravy). Transept crossings were built in 1250-67 by Jean de Chelles and Pierre de Montreuil (also the architect of the Sainte-Chapelle). The six-part rib vaults and the thin elements articulating the wall are typically Early Gothic.