enkyklios education
The secondary education in Byzantium. The students, from 12 years old, were taught grammar, rhetorics and eloquence.

oikonomia (kat'oikonomian)
A principle of action that allows a deviation from established rules if a (considered as) higher end is to be met.

sakellarios - sakellion
A Byzantine administrative term with two basic meanings: 1. The imperial treasury. A significant institution for administrative work and disbursement of funds. Connected with this are the offices of sakellarios (originally), chartulary of the sakelle (from the 9th c.), the sekreton of the sakellion, o epi sakelliou (the dignitary in charge since the 11th-12th c.). The "sakellarios" was, in all probability, the medieval name of the "tamias ton vasilikon chrematon" (royal treasurer).2. The treasury of the Great Church of Constantinople, i.e. Hagia Sophia. In the patriarchal sakelle were kept documents attesting to the property rights of the Patriarchate. In monasteries and lesser churches the corresponding title was megas sakellarios or "ho sakelliou".

scholastikos
A lawyer.

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.

tetragamy
A political and ecclesiastical controversy that followed the fourth marriage of emperor Leo VI (886-912). Since his only male heir had been a product of this marriage, it was of vital importance to leo to have the marriage recognised, whereas to the Church this was unacceptable. The issue was finally resolved in the Council of Constantinople in 920.