 Complete the following phrase:  In June 1270, Constantine Meliteniotes was sent by Byzantine emperor Michael VIII Palaiologos r. 12591282 on an embassy to King Louis IX of France, together with the then-chartophylax John Bekkos. The purpose of the embassy was to induce Louis to persuade his brother, Charles of Anjou, king of Sicily, to call off a planned assault upon Constantinople, which Michael VIII had recently recaptured from the Latins 1261. Louis was at that time outside the walls of Tunis, fighting a 