A set of forgeries attributed to a ruler with this name inspired pseudo-Joachim of Fiore to prophesize the rise of a bald-headed messiah. Scandal broke out after that ruler with this name married for the fourth time to a woman named for her “coal-black eyes.” (10[2])The so-called (10[1])Twenty Years’ Anarchy was ended (10[1])by a different (10[1])ruler with this name (-5[2])who allied (-5[1])with Khan Tervel (10[1])during a 717–718 (10[1])siege. A ruler with this (-5[1])name who authored the Taktiká was nicknamed for being well-read, unlike his illiterate father, who founded the Macedonian dynasty. Along with his son Constantine V, a ruler with this name updated portions of a predecessor’s Corpus (-5[1])Juris Civilis for the Ecloga. (10[1])The signature policy of a ruler with this name (-5[1])was reversed by Empress Irene. (10[3]-5[1])For (10[1])10 points, give this name (10[3])of an iconoclastic Byzantine emperor known as “the Isaurian (10[1])■END■ (10[6]0[4])