Pietro Ziani was the forty-second Doge of Venice from 1205 to 1229. He was the son of Sebastian Ziani, and succeeded Enrico Dandolo. Ziani was first doge to demand an oath from the Venetian colony in the Latin Empire in Constantinople, established after the Fourth Crusade. In 1210 he signed a treaty with the despotate of Epirus under Michael I Komnenos Doukas to allow free trade to Venetian traders. Grand Procession of the Doge, 16th century For about a thousand years, the chief magistrate and leader of the Most Serene Republic of Venice was styled the Doge, a rare but not unique Italian title derived from the Latin Dux, as the major Italian parallel Duce and the English Duke. ... January 6 - Philip of Swabia becomes King of the Romans April 14 - Battle of Adrianople between Bulgars and Latins August 20 - Following certain news of Baldwin Is death, Henry of Flanders is crowned Emperor of the Latin Empire April 1 - King Amalric II of Jerusalem (born 1145) May 7... Events February 18 - The Sixth Crusade: Frederick II, Holy Roman Emperor signs a ten-year truce with al-Kamil, regaining Jerusalem, Nazareth, and Bethlehem with neither military engagements nor support from the papacy. ... Sebastiano Ziani was a famous leader of Venice, and was Doge from 1172 to 1178. ... Dandolo Preaching the Crusade, by Gustav Dore Tomb of Enrico Dandolo Enrico Dandolo (1107?-1205) was the Doge (1192-1205) of Venice during the Fourth Crusade. ... Grand Procession of the Doge, 16th century For about a thousand years, the chief magistrate and leader of the Most Serene Republic of Venice was styled the Doge, a rare but not unique Italian title derived from the Latin Dux, as the major Italian parallel Duce and the English Duke. ... Arms of the Latin Empire of Constantinople The Latin Empire with its vassals and the Greek successor states after the partition of the Byzantine Empire, c. ... This article is about the city before the Fall of Constantinople (1453). ... Belligerents Crusaders Holy Roman Empire Republic of Venice Montferret Champagne Blois Amiens Île-de-France Saint-Pol Burgundy Flanders Balkans Byzantine Empire Kingdom of Hungary Croatia Dalmatia Commanders Otto IV Boniface I Theobald I Lois I Alexios V Doukas Isaac II Angelos Alexios III Angelos Emeric I The Fourth Crusade... End of the reign of Emperor Tsuchimikado, emperor of Japan Emperor Juntoku ascends to the throne of Japan Otto IV, Holy Roman Emperor excommunicated by Pope Innocent III for invading southern Italy in 1210 Gottfried von Strassburg writes his epic poem Tristan about 1210 Beginning of Delhi Sultanate Jochi, eldest... The Despotate of Epirus was one of the medieval Greek successor states of the Byzantine Empire, founded in the aftermath of the Fourth Crusade in 1204. ... Michael I Komnenos Doukas or Comnenus Ducas (Greek: Μιχαήλ Α΄ Κομνηνός Δούκας, Mikhaēl I Komnēnos Doukas), often inaccurately called Michael Angelos (a name he never used), was the founder and first ruler of the principality of Epirus from 1205 until his death in 1215. ...