It took roughly 180–200 years to build Notre Dame Cathedral in Paris, with the main construction running from 1163 to about 1345.

Quick Scoop

Short answer

  • Construction started: 1163.
  • Generally accepted completion of the main structure: 1345.
  • So when people ask “how long did it take to build Notre Dame?” the usual answer is about 182 years (1163–1345). Some sources round this to “about two centuries.”

Mini timeline of building

  • 1163: Foundation stone laid under Bishop Maurice de Sully, in the presence of King Louis VII and Pope Alexander III.
  • Late 12th–early 13th century: Choir, nave, and major structural elements go up; the cathedral is already in use for services.
  • 1182–1250: Western façade, nave, and the two main bell towers completed, giving Notre Dame its iconic front view.
  • By about 1250: Towers essentially finished; the silhouette most people recognize is in place.
  • 13th–14th century: Addition and refinement of flying buttresses, large stained-glass windows (including rose windows), and upper structural details.
  • Around 1345: Project regarded as effectively complete; this date is often quoted as the “completion” year.

So, while its core form was usable much earlier, the full medieval building campaign stretched across several generations, ending in the mid‑14th century.

Why the answer varies

People online and in forums sometimes give different numbers when they discuss how long it took to build Notre Dame.

  • Some say “about 87 years” and stop at 1250, focusing mainly on the period when the façade and towers were completed and the church looked mostly finished from the outside.
  • Others treat 1345 as the end, giving around 182 years of construction, from first stone to accepted completion.
  • Official and tourism sources often summarize this as “about two centuries of construction” , because work on structure and decoration kept evolving into the 14th century.

A good way to phrase it:

Notre Dame took nearly two centuries to build, with the main construction lasting from 1163 to 1345.

Later restorations and “is it really finished?”

Even after 1345, Notre Dame’s story kept changing, which is why some discussions sound like it was never fully done.

  • 18th–19th centuries: The cathedral suffered damage, neglect, and alterations.
  • 1840s–1860s: A major 19th‑century restoration led by Viollet‑le‑Duc added the famous spire and other neo‑Gothic elements, and this campaign alone took about 20 years.
  • 2019–2020s: After the 2019 fire, a huge reconstruction effort began to restore the roof and spire while preserving the original Gothic structure.

So, in a broader sense, Notre Dame has been built, repaired, and reshaped over more than 850 years, but the original construction phase that people mean when they ask “how long did it take to build Notre Dame?” is that roughly 180‑year medieval period.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.