Mainz and Gutenberg Museum. The first photos isn't anything special, except it is the "Town Hall" building for Mainz. I thought Susan would like to share it with her coworkers, who work in a Town Hall building slightly less massive.
The Gutenberg Museum was really neat. They had two original copies of the Gutenberg Bible, and lots of printing presses and documents throughout. We ended the tour with a 15 minute demonstration of an original working Gutenberg press. Susan got some photos of that on her phone.