Dating back to the 14th century, the cathedral is currently being restored but is still open for visitors—in fact, that's part of the fun. Tour guides hand out protective hardhats, and show you around the restoration site. It's a unique opportunity to study the building's architecture from the foundation up. A prominent and active supporter of the project is British novelist Ken Follett, whose novel World Without End is about the construction of the cathedral. A statue of the author has been placed on one side of the cathedral.