On the occasion of the 7th European Congress of Mathematics (7ECM) from July 18 to 22 in Berlin, mathematicians from Freie Universität will present their subject to the public at three different subway stations. The team led by Professor Ehrhard Behrends from the Department of Mathematics and Computer Science will give short presentations and demonstrations at the subway stations Wittenbergplatz, Potsdamer Platz, and Alexanderplatz (all on Line 2). Each day between 10 a.m. and 4 p.m., the presentations will give passers-by an impression of the diverse aspects of mathematics including its role in music and art and its importance for everyday objects such as in cryptography or in algorithms of search engines like Google. The mathematicians will also surprise the passengers with paradoxes and with magic tricks. Researchers and students from other European countries will also be participating in the activities.