 He was born in Cologne.Between 1988 and 1993 he studied mathematics and physics at the University of Cologne and received his doctorate in theoretical physics in 1997 with his thesis "Exact results for one-dimensional stochastic processes".From 1991 to 1996, Rajewsky studied piano at the Folkwang University of the Arts in Essen and completed his studies with the artistic diploma (künstlerische Reifeprüfung).