domestikos
A term that during Byzantine times denoted a wide array of ecclesiastic, civil and military officials. In church hierarchy the domestikoi were in charge of special groups connected with liturgical rites, such as lectors, sub-deacons but mainly cantors. In the military chain of command during the 6th, 7th and 8th century the domestikoi were the commanders of the tagmata, the regiments under the direct command of the Emperor.

domestikos ton scholon
Commander of the regiment of scholae. The first officer with this title appears in 767/8. In the 10th C the domesticos became very powerful among the army of the themata; in mid-10th C the office was divided in two, domestikoi ton scholon of the East and those of the West, commanders in chief of the eastern and the western provinces´ army respectively.

droungarios tes viglas
Commander of the tagma of the vigla (military corps in the Constantinople). The title is mentioned from the 9o C and existed until the 15o C. "Droungarios tes viglas" was responsible for guarding the emperor in the palace and on expeditions.

emir
(from Arabic amir) Emir meaning "commander" or "general", later also "prince". Also a high title of nobility or office in some Turkic historical states.

katepano
(from "epano","above") Governor of a katepania. Title that from the end of the 10th century characterized the commanders of large provinces as Italy or Mesopotamia and from the 11th century, it was used also in the regions of Bulgaria, Antioch etc.

magistros
Higher office that Philotheos in his Kletorologion places above the anthypatos. This title lost its importance from the 10th century and gradually disappeared - most probably in the middle of the 12th century.

patrikios
(from lat. patricius) Higher title of honour, placed, according to the "Tactika" of the 9th and the 10th centuries, between anthypatos and protospatharios. It was given to the most important governors and generals. Gradually, however, it fell into disuse and from the 12th century did not exist any more.

proconsul, -lis
A quite high ranking official, vir spectabilis according to the rank of the senate, who was inequable only to the Domestikos of the Scholae and to the Magister Militum per Orientem. The proconsul usually served as a governor of the Imperial provinces (i.e. in Asia Minor the provinces of Asia and Cappadocia). The office was demoted from the 9th century onwards and the term was in use until the 12th century meaning a dignity.

strategos ("general")
During the Roman period his duties were mainly political. Οffice of the Byzantine state´s provincial administration. At first the title was given to the military and political administrator of the themes, namely of the big geographic and administrative unities of the Byzantine empire. Gradually the title lost its power and, already in the 11th century, strategoi were turned to simple commanders of military units, responsible for the defence of a region.

stratelates
A high-ranking military official of the 10th and 11th centuries, commanding a military unit called "tagma of the stratelatai".

tagmata (pl.)
Military units stationed in Constantinople and its outskirts during the Middle Byzantine period. The most important tagmata were that of the Scholae, the Excubitors (these originated from respective units of the Early Byzantine period and were organized into an imperial guard and a central strike force by Constantine V), the Vigilia (established by Irene the Athenian) and the Hikanatoi (established by Nicephorus I).