Werner Kutzelnigg (September 10, 1933 – November 24, 2019 in Bochum) was a prominent Austrian-born theoretical chemist and professor in the Chemistry Faculty, Ruhr-Universität Bochum, Germany.Kutzelnigg was born in Vienna. His most significant contributions were in the following fields: relativistic quantum chemistry, coupled cluster methods, theoretical calculation of NMR chemical shifts, explicitly correlated wavefunctions. He was a member of the International Academy of Quantum Molecular Science.