Cathédrale Saint-Gatien de Tours is dedicated to the first bishop of the city and is a 'must-see' when visiting the Loire Valley. The current cathedral sits on the site of a number of predecessors all of which were damaged by fires. One in 1166 during the conflict between Louis VII of France and Henry II of England (who also ruled over the neighbouring region of Anjou at the time).
Construction proper on the existing cathedral began in 1270 but progress was slow and it was not completed until 1547, so what we have is a building made up of styles spanning a number of centuries, though the predominate 'style' is obviously 'Gothic'.
The nave was completed around 1450, in the flamboyant style we see today. Then, from 1450 to 1484, the facade is built in the same style on the foundations of a Gallo-Roman wall. The north tower was completed around 1507 while the south tower, in the same style, would not be completed for another 40 years!. Both seem to have acquired renaissance caps.
https://www.experienceloire.com/tours-cathedral.htm