Deutsches Museum is one of the biggest museums devoted to technology and natural sciences in Europe with more than 55,000 square meters of exhibition space in the main building on the island, 40 departments and approximately 1.3 million visitors per year. It shows and explains the evolution of technology and science from the early beginnings to the present. The unique collection of exhibits (historical and modern) on display are supplemented by interactive experiments, dioramas, films and multi-media systems. Large library and extended archives as well as a research institute for the history of technology and sciences and the Kerschensteiner Kolleg for the advanced training of teachers, students and museum staff also belong to the Deutsches Museum.