Kaisar (καῖσαρ) – "Caesar": originally, as in the late Roman Empire, it was used for a subordinate co-emperor or the heir apparent, and was first among the "awarded" dignities. The office enjoyed extensive privileges, great prestige and power. When Alexios I created sebastokratōr, kaisar became third in importance, and fourth after Manuel I created despotēs. The feminine form was kaisarissa. It remained however an office of great importance, and was awarded to a few high-ranking and distinguished officials, and was only rarely awarded to foreigners. Justinian II named Tervel, khan of the Bulgars, kaisar in 705; the title then developed into the Slavic term tsar or czar (from Latin through Bulgarian and then into Russian, Serbian etc.). Andronikos II Palaiologos also named Roger de Flor, leader of the Catalan Grand Company, kaisar in 1304.
