Mainz (/maɪnts/; German: [maɪ̯nt͡s]; Latin: Mogontiacum, French: Mayence) is the capital and largest city of the state of Rhineland-Palatinate in Germany. It was the capital of the Electorate of Mainz at the time of the Holy Roman Empire. In antiquity Mainz was a Roman fort city which commanded the west bank of the Rhine and formed part of the northernmost frontier of the Roman Empire; it was founded as a military post by the Romans in the late 1st century BC and became the provincial capital of Germania Superior. The city is located on the river Rhine at its confluence with the Main opposite Wiesbaden, in the western part of the Frankfurt Rhine-Main; in the modern age, Frankfurt shares much of its regional importance.

The city is famous as the home of the invention of the movable-type printing press, as the first books printed using movable type were manufactured in Mainz by Gutenberg in the early 1450s. Until the twentieth century, Mainz was usually referred to in English by its French name: Mayence.

Mainz is located on the 50th latitude, on the west bank of the river Rhine, opposite the confluence of the Main with the Rhine. The population in the early 2012 was 200,957, an additional 18,619 people maintain a primary residence elsewhere but have a second home in Mainz. The city is part of the Rhein Metro area comprising 5.8 million people. Mainz can easily be reached from Frankfurt International Airport in 25 minutes by commuter railway (Line S8).

...
Wikipedia