{"slug": "john-iii-doukas-vatatzes", "label": "John III Doukas Vatatzes", "wikipedia": "https://en.wikipedia.org/wiki/John_III_Doukas_Vatatzes", "wikidata": "https://www.wikidata.org/wiki/Q37072", "qid": "Q37072", "description": "Emperor of Nicaea", "entries": 6, "years": 6, "span": [1193, 1254], "span_label": ["1193 CE", "1254 CE"], "topics": [{"title": "Deaths", "count": 2}, {"title": "Conflict & Security", "count": 2}, {"title": "Births", "count": 1}, {"title": "Religion & Belief", "count": 1}], "related": [{"slug": "empire-of-nicaea", "label": "Empire of Nicaea", "shared": 4}, {"slug": "constantinople", "label": "Constantinople", "shared": 3}, {"slug": "november", "label": "November", "shared": 2}, {"slug": "latin-empire", "label": "Latin Empire", "shared": 2}, {"slug": "frederick-ii-holy-roman-emperor", "label": "Frederick II, Holy Roman Emperor", "shared": 1}, {"slug": "pope-honorius-iii", "label": "Pope Honorius III", "shared": 1}, {"slug": "istanbul", "label": "Istanbul", "shared": 1}, {"slug": "nicaea", "label": "Nicaea", "shared": 1}, {"slug": "iznik", "label": "İznik", "shared": 1}, {"slug": "byzantine-emperor", "label": "Byzantine emperor", "shared": 1}, {"slug": "john-of-brienne", "label": "John of Brienne", "shared": 1}, {"slug": "second-bulgarian-empire", "label": "Second Bulgarian Empire", "shared": 1}], "items": [{"year": 1193, "year_label": "1193 CE", "section": "Births", "date": null, "text": "John III (Doukas Vatatzes), emperor of Nicaea (d. 1254)", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1367180478#Births", "title": "1193", "revid": 1367180478, "section": "Births"}}, {"year": 1221, "year_label": "1221 CE", "section": "Deaths", "date": "November", "text": "November – Emperor Theodore I Laskaris dies after a 16-year reign and is succeeded by his son-in-law John III Doukas Vatatzes. John fends off Theodore's brothers, who believe that they have the better claim for the throne of the Empire of Nicaea. In December, he becomes the sole ruler, and during his reign, the Empire becomes the most powerful of the Byzantine successor states and the frontrunner in the race to recover Constantinople from the Latin Empire. John also cultivates a close relationship with Frederick II, Holy Roman Emperor, and negotiates with Pope Honorius III about the possibility of reuniting the Church.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1363300593#Byzantine_Empire", "title": "1221", "revid": 1363300593, "section": "Events › By place › Byzantine Empire"}}, {"year": 1223, "year_label": "1223 CE", "section": "Religion & Belief", "date": "January 4", "text": "January 4 – Germanus II takes office as Patriarch of Constantinople, leader of the Eastern Orthodox Church, after moving the patriarchate's capital 56 mi from Constantinople (now Istanbul) to Nicaea (now Iznik in Turkey), as the guest of John III Doukas Vatatzes, Emperor of Nicaea.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1336497375#January–March", "title": "1223", "revid": 1336497375, "section": "Events › January–March"}}, {"year": 1235, "year_label": "1235 CE", "section": "Conflict & Security", "date": null, "text": "Siege of Constantinople: The Byzantine emperor John III Doukas Vatatzes and the Bulgarian tsar Ivan Asen II besiege Constantinople in an attempt to take it from its Latin rulers, John of Brienne and Baldwin II. Angelo Sanudo successfully negotiates a two-year truce.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1362483906#Events", "title": "1235", "revid": 1362483906, "section": "Events"}}, {"year": 1246, "year_label": "1246 CE", "section": "Conflict & Security", "date": "November", "text": "November – Michael II Asen, ruler (tsar) of the Bulgarian Empire, succeeds his brother Kaliman I (possibly poisoned). He confirms the reconquest of Bulgarian territories against John III (Doukas Vatatzes), Byzantine ruler of the Empire of Nicaea.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1356775338#Europe", "title": "1246", "revid": 1356775338, "section": "Events › By place › Europe"}}, {"year": 1254, "year_label": "1254 CE", "section": "Deaths", "date": "November 3", "text": "November 3 – John III Doukas Vatatzes, Byzantine emperor", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1296887805#Deaths", "title": "1254", "revid": 1296887805, "section": "Deaths"}}]}