 Complete the following phrase:  Guaimar IV c. 1013  2, 3 or 4 June 1052 was Prince of Salerno 10271052, Duke of Amalfi 10391052, Duke of Gaeta 10401041, and Prince of Capua 10381047 in Southern Italy over the period from 1027 to 1052. He was an important figure in the final phase of Byzantine authority in the Mezzogiorno and 