Definitions:
the subject of a talk, piece of writing, exhibition, etc.; a topic

an idea that recurs in or pervades a work of art or literature

a setting given to a restaurant, pub, or leisure venue, intended to evoke a particular country, historical period, culture, etc.

the stem of a noun or verb; the part to which inflections are added, especially one composed of the root and an added vowel.

any of the twenty-nine provinces in the byzantine empire.

give a particular theme or setting to (a leisure venue, event, etc.)