Schliemann’s assistant, Wilhelm Dörpfeld, a German architect, identified Troy’s nine basic strata—a scheme archaeologists continue to follow today. He completed his excavations in 1894. From 1932 to 1938, Carl Blegen, sponsored by the University of Cincinnati, used highly refined excavation methods to differentiate 46 separate construction phases (or sub-strata) at Troy. Blegen’s most famous finds were a large palace from Troy VI (the so-called Pillar House) and a Greek-Roman sanctuary. The current excavations, begun in 1988, are directed by Manfred Korfmann of Tübingen University.