Irene Sarantapechaina known as Irene of Athens or Irene the Athenian (c. 752 – August 9, 803) was a Byzantine empress regnant from 797 to 802, having previously been empress consort from 775 to 780, and empress dowager and regent from 780 to 797. It is often claimed she called herself "basileus

Basileus

Basileus is a Greek term and title that has signified various types of monarchs in history. It is perhaps best known in English as a title used by the Byzantine Emperors, but also has a longer history of use for persons of authority and sovereigns in ancient Greece, as well as for the kings of...

" (βασιλεύς), 'emperor'. In fact, she normally referred to herself as "basilissa" (βασίλισσα), 'empress', although there are three instances of the title "basileus" being used by her.
Irene was born to a noble Greek

Greeks

The Greeks, also known as the Hellenes , are a nation and ethnic group native to Greece, Cyprus and neighboring regions. They also form a significant diaspora, with Greek communities established around the world....

 family of Athens

Athens

Athens , is the capital and largest city of Greece. Athens dominates the Attica region and is one of the world's oldest cities, as its recorded history spans around 3,400 years. Classical Athens was a powerful city-state...

, the Sarantapechos family.