Okay so if you read my travel reviews you'll know I'm a sucker for old cathedrals and churches…read more They always have amazing antiquities, beautiful art, and in my opinion, give you a sense of the story of a place. This one is no different. I love that it's free to explore, and that despite it being a church, there is actually quite a bit to see. It's very large, has beautiful stained glass, and even a courtyard to explore. Due to the time difference between KC and Germany I ended up getting a facetime call from my toddler while I was here so I popped out about midway through our time here to take a break, so I feel like there might be even more to see than what my time permitted. One extra thing to add that is important is that this is one of few churches I've been to that has public restrooms! I think they cost one or two euro but it was so nice to be able to use them while out and about in Mainz. If you're visiting Mainz this is a must visit - it's cheap, and gives you a really good sense of the history of the place.