Habilitation, Lódz, Poland, 1979; Doctor of Philosophy, Lódz, Poland, 1967; Master of Arts, Lódz, Poland, 1960.
From assistant to docent University Lódz, 1960-1990, professor, since 1990. Head of the chair of ancient and medieval history University Lódz, 1980-1992. Head of the chair of Byzantine History, since 1992.
Vice dean department philosophy and history, 1981-1984, 87-90.
Member Polish History Society, Polish Philological Society, Polish Academy of Sciences (Byzantine section vice president since 1985, president since 1996).
Married Barbara Dziegielewska, April 7, 1960. 1 child, Dorota.