http://www.EuropeanBarging.com - A visit to the Gugenheim Museum in Mainz is often included on any Rhine River cruise that stops in Mainz or Frankfurt. The printing press invented by German goldsmith Johann Gutenberg in 1448 has been called one of the most important inventions in the history of humankind. The device made it possible for the first time for the common man, woman and child to have access to books, which meant they would for the first time have unprecedented ability to accumulate knowledge. The museum, though small has a great collection of old printing presses as well as early printed bibles and books. Located in a quiet area near the river, there are many shops in the areas well for shopping.