YAVNE, Israel, Nov 29 (Reuters) - Archaeological finds in Israel have shed light on Yavne, an ancient town that served as the retreat for Jewish authorities after the fall of Jerusalem during a rebellion against Roman rule. The excavation unearthed ruins of a building with cups made of chalkstone, a material deemed appropriate for Jewish religious rites, pointing to the presence of the exiled Sanhedrin legislative assembly, the Israel Antiquities Authority said. Cited by the Roman historian Josephus, Yavne served as focal point of Jewish activity. According to Jewish scripture, the Sanhedrin was reconstituted there with Roman consent during a...