This beautiful cathedral was built during the Gothic period, but started at the beginning of Gothic and finished at the very end of Gothic, so that's why the two towers don't match - one was built at the beginning of the cathedral's construction and the other at the end of construction.
Just a fun fact for your cathedral knowledge bank.
The west rose window was under construction while we were there, but it was still amazing. We spend over an hour wandering around and observing and discussing all the facade design and architecture.
This cathedral is so amazing! (hollow sentence, but really, it is.)
And then we explored the town of Chartes. And we love it. And we would be perfectly happy living there.
Including the creepy old guy outside the cathedral singing "He's Got the Whole World in His Hands" and getting it stuck in my head for the rest of the day.