The University of Duisburg-Essen (German: Universität Duisburg-Essen) is a public university in Duisburg and Essen, North Rhine-Westphalia, Germany and a member of the newly founded University Alliance Metropolis Ruhr. It was founded in 1654 and re-established on 1 January 2003 as a merger of the Gerhard Mercator University of Duisburg and the University of Essen.
Until 1994 the name of the Gerhard Mercator University was Comprehensive University of Duisburg.
With its 12 departments and around 40,000 students, the University of Duisburg-Essen is among the 10 largest German universities. Since 2014 research income has risen by 150 percent