Map of the Eastern Roman Empire in 717 A.D. during the Twenty Years' Anarchy.
Striped land shows areas constantly raided. There are 12 provinces, of which 7 are classed as Themes:

Exarchate of Ravenna
Venetia and Istria
Duchy of Rome
Duchy of Naples
Duchy of Calabria
Thema of Hellas
Thema of Thrace
Thema of Opsikion
Thema of Thrakesion
Thema of Anatolikon
Thema of Karabisianoi
Thema of Armeniakon
Own work based on: ByzantineEmpire717+extrainfo+themes.PNG

References: Haldon, John F. (1997) "Maps III &amp; IV" in     Byzantium in the Seventh Century: The Transformation of a Culture, Cambridge:  Cambridge University Press, pp. 65, 81  ISBN:  9780521319171.  OCLC:   1028767672.
ByzantineEmpire717+extrainfo+themes.PNG: User:Amonixinator
derivative work: Hoodinski (talk)