Associate Professor of Art History and Archaeology, Columbia University. Teaches ancient Greek art and archaeology at Columbia University. He has received fellowships and grants from the Alexander S. Onassis Foundation, the Ernst-Kirsten Society, the Friedrich-Naumann Foundation, the Gerda-Henkel Foundation, and the German Research Council. His book, Πελοπόννησος οἰκητήριον Ποσειδῶνος. Heiligtümer und Kulte des Poseidon auf der Peloponnes, Kernos supplement 13, Liège 2003, won the Margarete Häcker Award for the best dissertation in Classical Studies in German language (2002). He is co-editor of the Epigraphic Bulletin for Greek Religion (EBGR) and co-author of the Chronique archéologique de la religion grecque (ChronARG).