Father Matey Preobrazhenski (Bulgarian: Матей Преображенски, "Matthew of the Transfiguration"; 1828–1 March 1875) was the clerical name of Mono Petrov Seizmonov (Моно Петров Сеизмонов), nicknamed Mitkaloto ("The Wandering One"), Ochmatey or Ochkata, a Bulgarian Orthodox priest, revolutionary, enlightener and a close friend of Vasil Levski.

Father Matey was born in the village of Novo Selo near Veliko Tarnovo in 1828; his two brothers and sister died at an early age.

However, his secular interests were not approved by the brothers of Mount Athos and left the peninsula after a fight; he used a boat to reach the island of Thasos.

He supported the local population by appointing village teachers, founding community centres (chitalishta), producing theatrical plays, organising agricultural associations, issuing own books, etc.

From that point on, Father Matey took an active part in the revolutionary work by carrying the organisation's secret mail and weaponry and accompanying Levski and Angel Kanchev on their journeys.