when was notre dame built

The construction of Notre-Dame Cathedral in Paris began in 1163 under the direction of Bishop Maurice de Sully. The cathedral was largely completed by around 1345, though many modifications and additions were made over the following centuries. The initial building phases included the choir, completed by 1182, followed by the nave and the iconic western façade towers, which were finished in the mid-13th century. The cathedral represents one of the greatest architectural achievements of the Middle Ages and is a prime example of Gothic architecture.