روبرت جيسكارد
In 1055 the Normans first appeared in Calabria, initiating a lengthy struggle between Byzantine forces who were occupying the territory and the Norman invaders. The "Chronicum Northmannicum" states that a battle took place at Oria, and that Humphredus (Onophrius), the brother of Count William Iron-Arm, conquered the Greeks; he died the next year. His brother Count Robert Guiscard captured Hydruntum and Castra Minervae, and in 1056 he seized Taranto, but was repulsed; he took it permanently in May 1060. That summer, Count Malagerius came to Oria and expelled the Greeks from it. In 1062, Robert Guiscard took Brindisi again, and later came to Oria and took it again. In 1082 Oria was besieged by Geoffrey of Conversano, but in April his uncle Robert Guiscard raised the siege.