Delian or First Athenian League
League established by the Athenians after the end of the Persian Wars (478 BC). Many city-states of the Aegean were included in the league with the obligation to contribute ships or money. The lists with the sums offered by each member allow us to estimate their economic situation.

templon or iconostasis
A structure separating the sanctuary from the main church. At first, it simply divided the nave from the presbytery, but later it became higher, with small columns and an epistyle. From the 11th century onwards, icons were placed between the templon columns and, somewhat later, icons were also placed above the epistyle, thus forming the iconostasis. The templon were originally from marble. Wooden iconostases appeared from the 13th century.

theme
A Byzantine term that signifies wide military and administrative units under the administration of a strategos (general). The institution was consolidated in the 7th century and was characteristic for the organization and the division of Byzantine Empire at the Middle Byzantine period. The term applies also to the army unit that resided in each administrative unit and was staffed by farmer-soldiers. The thematic system was maintained until the end of Byzantine period. However, in the Later Byzantine period it was used in order to declare mostly tax units.