Note 519 — Chapter IV · BAYEZID THE OSMANLIS INHERIT THE BYZANTINE EMPIRE
Reading edition
Leunclavius, Hist. Musul. Turc., preface, p. 14, speaks of how grateful Sigismund was later for the services rendered to him personally by the Burgrave in the Nicopolis campaign, and that the friendship formed then led to the later advancement of the house of Brandenburg.