Well, I just wonder why it is not on the list already! One of the most beautiful cathedrals ever seen, highly recommended, in fact, reserve some more time as also Naumburg Old Town is very interesting. For me for sure it will be on the list in the future. Visited just recently (August 2014), entrance ticket is quite expensive (6,5 Euro for an adult person) but the place is worth every single euro to spare ....