Maria Palaiologina Kantakouzene

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Maria Palaiologina Kantakouzene (Bulgarian: Мария Палеологина Кантакузина, Greek: Μαρία Παλαιολογίνα Καντακουζηνή; died after 1294) was an Empress consort of Bulgaria by marriage to two Bulgarian emperors, Constantine Tikh and Ivaylo. She was a niece of Michael VIII Palaiologos.

She is referred to as the most powerful empress of Bulgaria. She ruled as regent from 1271 to 1279 on behalf of her minor son, Michael Asen II, who was made co-regent of her first spouse, and remained co-regent during the reign of her second spouse.