Atypical dictionary definition of the word dynasty is ‘a line of hereditary rulers of a country’.' This rather innocuous definition conceals a historiographical problem. Apropos of this problem, the Polish historian Natalia Nowakowska, in her study of the Jagiellonian dynasty (c. 1385-1572), concluded that a change in the definition of the term occurred with the publication of the fifth volume of the French Encylopédie in 1755, which changed the meaning from any ‘government’ or ‘regime’ in general to the specific definition ‘a hereditary line of princes’.