In its classical form during the 8th and 9th centuries, the theme stretched over the ancient regions of Lycaonia, Pisidia, Isauria, as well as most of Phrygia and parts of Galatia Salutaris. Initially, the Anatolic Theme included the western and southern shores of Asia Minor as well, but by c. 720 they were split off to form the Thracesian and Cibyrrhaeot themes. Under Theophilos (r. 829-842), its eastern and south-eastern portions, facing the Arab frontier zone and including the forts that guarded the northern entrance to the Cilician Gates, were detached to form two new frontier districts (kleisourai), those of Cappadocia (originally a division, or tourma, of the Anatolics) and Seleucia. Emperor Leo VI the Wise (r. 886-912) later ceded the region west of Lake Tuz (the banda of Eudokias, Hagios Agapetos and Aphrazeia) to Cappadocia. The theme's capital was Amorium, until the sack of the city by the Abbasids in 838. After that, it was probably transferred to the nearby fortress of Polybotos.