Tel Ali is an archaeological site located one mile south of the Sea of Galilee, in the central Jordan Valley, Israel. It has been excavated twice. First, during the years 1955–1959, Moshe Prausnitz conducted salvage excavations on behalf of the Israel Department of Antiquities. He published only preliminary reports and most of the excavation finds remained unstudied. Prausnitz uncovered a detailed sequence of occupation including: Pre-Pottery Neolithic B, Pre-Pottery Neolithic C, Pottery Neolithic B (Wadi Rabah), Middle Chalcolithic (Beth-Shean XVIII) and Late Chalcolithic (Ghassulian). However, at the time of excavation many of these phases had not yet been defined. The picture at Tel Ali became clearer only after Yosef Garfinkel's excavations in 1989–1990. Two excavation areas were opened and 300 sqm were uncovered. Tel Ali contributes to the understanding of the Neolithic and Chalcolithic periods in a variety of ways: