In addition to the natural gains of land , and wealth and manpower received Receiving from these victories , the Byzantines also inflicted Bodily_harm a psychological defeat Earnings_and_losses on their opponents by recapturing Conquering territory deemed holy and important to Christendom , in particular the city of Antioch—allowing Byzantium to hold Defending two of Christendoms ' five most important Patriarchs , those making up Becoming_a_member the Pentarchy .