The municipal library, with 300,000 volumes, boasts among its rarer treasures a Gutenberg Bible printed at Mainz between 1450 and 1455, another on parchment dated 1462, the Institutiones Justiniani (Mainz, 1468), the Theuerdank, with woodcuts by Hans Schaufelein, and numerous valuable autographs.
The old electoral palace (1627-1678), a large building of red sandstone, now contains a valuable collection of Roman and Germanic antiquities, a picture gallery, a natural history museum, the Gutenberg Museum, and a library of 220,000 volumes.
Other examples include Ruby on Rails and Project Gutenberg to Freecycle and the entire concept of freeware.
The citizens espoused the cause of Diether, but their city was captured by Adolph; it was then deprived of its privileges and was made subject to the archbishop. Many of the inhabitants were driven into exile, and these carried into other lands a knowledge of the art of printing, which had been invented at Mainz by Johann Gutenberg in 1450.