Below the church you can visit the workers area. Here you can find old paintings, plans, small model of different parts and so on.
You can reach this area also from the place before Christmas front. Leave the building and turn right. Follow the path leading you down, below the building.
Here, you can also find one of the two gift shops. 🙂 (The other one is on the Easter front side).
Take care!
MyBlog - solaner 
Such extraordinary architecture… the realm of the fantastical.
yes, it is. And, although it seems to be an imaginary building, it really exists! 🙂