According to Villehardouin, Dandolo died before May 29, but since Andrea Dandolo gives June 1 and a letter dated June 6 doesn't mention his death, the date is often stated as June while Madden prefers to follow the contemporary Villehardouin (Madden 2003, n.144 p. 266) Madden, Thomas F. (2003). Enrico Dandolo and the Rise of Venice. Baltimore: Johns Hopkins University Press. ISBN0-8018-7317-7.
Villehardouin, Geoffroi de; White, Julian Eugene (1968). La conqueste de Constantinople (in French). New York: Appleton-Century-Crofts. p. 46. OCLC746970.