sentences:  The city skyline is dominated by Konstanz Cathedral, several other churches and three towers left over from the city wall, one of which marks the place of the former medieval bridge over the Rhine.The University of Konstanz was established close to the town in 1966.It houses an excellent library with approximately two million books, all freely accessible 24 hours a day, as well as a botanical garden (the Botanischer Garten der Universität Konstanz).