The theme of Iberia () was an administrative and military unit – theme – within the Byzantine Empire carved by the Byzantine Emperors out of several Georgian lands in the 11th century. It was formed as a result of Emperor Basil II’s annexation of a portion of the Bagrationi Dynasty domains (1000–1021) and later aggrandized at the expense of several Armenian kingdoms acquired by the Byzantines in a piecemeal fashion in the course of the 11th century. The population of the theme—at its largest extent—was multiethnic with a possible Georgian majority, including a sizable Armenian community of Chalcedonic rite to which Byzantines sometimes expanded, as a denominational name, the ethnonym "Iberian", a Graeco-Roman designation of Georgians. The theme ceased to exist in 1074 as a result of the Seljuk invasions. Foundation and enlargement The theme was created by the emperor Basil II (976–1025) from the lands inherited from the Georgian prince David III of Tao. These areas – parts of the Armeno-Georgian marchlands centered on Thither Tao, including Theodosioupolis (now Erzurum, Turkey), Phasiane, Hark’, Apahunik’, Mardali (Mardaghi), Khaldoyarich, and Ch’ormayari – had been granted to David for his crucial assistance to Basil against the rebel commander Bardas Sclerus in 979. However, David's rebuff of Basil in Bardas Phocas’ revolt of 987 evoked Constantinople’s distrust of the Caucasian rulers. After the failure of the revolt, David was forced to make Basil II the legatee of his extensive possessions. Basil gathered his inheritance upon David’s death in 1000, forcing the successor Georgian Bagratid ruler Bagrat III to recognize the new rearrangement. Bagrat’s son, George I, however, inherited a longstanding claim to David’s succession. While Basil was preoccupied with his Bulgarian campaigns, George gained momentum to invade Tao and Phasiane in 1014. Defeated in the ensuing Byzantine-Georgian wars, George had to relinquish further lands – Kola, Artaan and Javakheti – to the Byzantine crown in 1022. These provinces were organized by Basil II into the theme of Iberia with the capital at Theodosiopolis. Henceforth, the theme of Iberia was administered jointly with Ducate of Chaldia. As a result, the political center of the Georgian state moved north, as did a significant part of the Georgian nobility, while the empire gained a critical foothold for further expansion into the territories of Armenia and Georgia. Government The exact chronology of the theme of Iberia and of its governors is not completely clear. Unfortunately, the few