Saint Bertha or Saint Aldeberge was the queen of Kent whose influence led to the Christianization of Anglo-Saxon England. She was canonized as a saint for her role in its establishment during that period of English history.

The Kingdom of the Kentish, today referred to as the Kingdom of Kent, was an early medieval kingdom in what is now South East England. It existed from either the fifth or the sixth century AD until it was fully absorbed into the Kingdom of Wessex in the late 9th century and later into the Kingdom of England in the early 10th century.