Hellas (theme)
The Theme of Hellas was a Byzantine military-civilian province located in southern Greece. The theme encompassed parts of Central Greece, Thessaly and, until c. 800, the Peloponnese peninsula. It was established in the late 7th century, and was broken up into smaller districts in the late 11th/early 12th century. The theme fell to the Crusader army led by Boniface of Montferrat in 1205.
Source: Wikipedia
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