Ernst J. Grube (May 9, 1932 - June 12, 2011) was one of the outstanding scholars in the field of Islamic art. He conducted research and published in unusual width and depth, providing some reference works of lasting value. His iconographic contributions and bibliographical surveys are legendary, as demonstrated in the joint volume (with Jeremy Johns) on the "Painted Ceilings of the Cappella Palatina" in Palermo (Islamic Art, Suppl. I, 2005). Together with his wife and colleague Eleanor Sims, specialist on Islamic painting, they edited the journal Islamic Art, vols. 1-6 (1981-2009) for more than two decades.
See the obituaries in the TIMES (by J. Johns) and in DER ISLAM by C.P. Haase.