* All the important places in the center of Mainz are waiting for you. The remains of an ancient Roman fortress and an amphitheater. Rarities of the Mainz Cathedral. The city of Gutenberg's first printer and now a wonderful Museum of printed books. A market fountain, Historical and Carnation columns, Medieval watchtowers and churches. The stained glass windows of Marc Chagall in the Church of St. Stephen... The city of science and the city of Carnival.