Today, we did Chaumont-sur-Loire. Built between 1466 and 1510. That's nearly 50 years for a project. You have to let that go through your brain a little to realize how long that really is. Wouldn't work today of course but when you think about the tools they had then, I think they did pretty well to finish it in just under 50 years.

In the above map you can see the location ...