{"slug": "boris-i-of-bulgaria", "label": "Boris I of Bulgaria", "wikipedia": "https://en.wikipedia.org/wiki/Boris_I_of_Bulgaria", "wikidata": "https://www.wikidata.org/wiki/Q311057", "qid": "Q311057", "description": "Bulgarian ruler", "entries": 12, "years": 12, "span": [852, 907], "span_label": ["852 CE", "907 CE"], "topics": [{"title": "Conflict & Security", "count": 4}, {"title": "Geopolitics & Diplomacy", "count": 3}, {"title": "Deaths", "count": 2}, {"title": "Religion & Belief", "count": 2}, {"title": "Culture & Society", "count": 1}], "related": [{"slug": "first-bulgarian-empire", "label": "First Bulgarian Empire", "shared": 10}, {"slug": "khan-title", "label": "Khan (title)", "shared": 8}, {"slug": "bulgaria", "label": "Bulgaria", "shared": 4}, {"slug": "eastern-orthodox-church", "label": "Eastern Orthodox Church", "shared": 2}, {"slug": "military-alliance", "label": "Military alliance", "shared": 2}, {"slug": "rome", "label": "Rome", "shared": 1}, {"slug": "byzantine-empire", "label": "Byzantine Empire", "shared": 1}, {"slug": "serbia", "label": "Serbia", "shared": 1}, {"slug": "bulgars", "label": "Bulgars", "shared": 1}, {"slug": "charles-the-bald", "label": "Charles the Bald", "shared": 1}, {"slug": "louis-the-german", "label": "Louis the German", "shared": 1}, {"slug": "belgrade", "label": "Belgrade", "shared": 1}], "items": [{"year": 852, "year_label": "852 CE", "section": "Deaths", "date": null, "text": "Presian I, ruler (khan) of the Bulgarian Empire, dies after a 23-year reign in which the Bulgarians have expanded into Upper Macedonia and Serbia. He is succeeded by his son Boris I, as monarch of Bulgaria.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1287194271#Europe", "title": "852", "revid": 1287194271, "section": "Events › By place › Europe"}}, {"year": 853, "year_label": "853 CE", "section": "Geopolitics & Diplomacy", "date": null, "text": "King Charles the Bald bribes Boris I, ruler (khan) of the Bulgarian Empire, to form an alliance against his brother Louis the German, with Rastislav of Moravia.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1267072185#Europe", "title": "853", "revid": 1267072185, "section": "Events › By place › Europe"}}, {"year": 854, "year_label": "854 CE", "section": "Conflict & Security", "date": null, "text": "Croatian–Bulgarian battle: Bulgarian Khan (later Knyaz) Boris I, attacks the Duchy of Littoral Croatia, ruled by Duke Trpimir I during the First Croatian-Bulgarian War. It is fought on the Croatian territory in the vicinity of the Croatian–Bulgarian border in present-day northeastern Bosnia and Herzegovina. None of the warring sides emerges victorious, Bulgarian forces retreat and finally both parties subsequently conclude a peace treaty.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1341129142#Europe", "title": "854", "revid": 1341129142, "section": "Events › By place › Europe"}}, {"year": 863, "year_label": "863 CE", "section": "Conflict & Security", "date": null, "text": "The Byzantine Empire invades Bulgaria in order to impose Orthodox Christianity on Boris I.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1322668706#Europe", "title": "863", "revid": 1322668706, "section": "Events › By place › Europe"}}, {"year": 864, "year_label": "864 CE", "section": "Religion & Belief", "date": null, "text": "The Christianization of Bulgaria begins: Boris I, Knyaz of the Bulgarian Empire, is converted to Orthodox Christianity. His family and high-ranking dignitaries accept the Orthodox faith at the capital, Pliska - from this point onwards the rulers of the Bulgarian Empire are known as ‘Tsars’ rather than ‘Khans’.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1365939843#Religion", "title": "864", "revid": 1365939843, "section": "Events › By topic › Religion"}}, {"year": 865, "year_label": "865 CE", "section": "Conflict & Security", "date": null, "text": "Boris I, ruler (knyaz) of the Bulgarian Empire, suppresses a revolt, and orders the execution of 52 leading boyars, along with their whole families.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1341129586#Europe", "title": "865", "revid": 1341129586, "section": "Events › By place › Europe"}}, {"year": 866, "year_label": "866 CE", "section": "Geopolitics & Diplomacy", "date": null, "text": "Boris I, ruler (knyaz) of the Bulgarian Empire, sends a diplomatic mission, led by the Bulgarian nobleman Peter, to Rome, in an effort to renew ties with the West.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1341129580#Religion", "title": "866", "revid": 1341129580, "section": "Events › By topic › Religion"}}, {"year": 878, "year_label": "878 CE", "section": "Religion & Belief", "date": "April 16", "text": "April 16 – The city of Belgrade is first mentioned in a papal letter to Boris I, ruler (khan) of the Bulgarian Empire.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1353695287#Religion", "title": "878", "revid": 1353695287, "section": "Events › By topic › Religion"}}, {"year": 886, "year_label": "886 CE", "section": "Culture & Society", "date": null, "text": "Boris I, ruler (khan) of the Bulgarian Empire, establishes the Preslav and Ohrid Literary Schools.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1367666946#Religion", "title": "886", "revid": 1367666946, "section": "Events › By topic › Religion"}}, {"year": 889, "year_label": "889 CE", "section": "Geopolitics & Diplomacy", "date": null, "text": "Boris I, ruler (khan) of the Bulgarian Empire, abdicates the throne after a 37-year reign, and retires to a monastery. He is succeeded by his eldest son Vladimir, as monarch of Bulgaria. Vladimir falls under the influence of the old boyars; many remain anti-Christian and anti-Byzantine. He attempts to restore the former Frankish alliance, and to reestablish paganism.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1341129924#Europe", "title": "889", "revid": 1341129924, "section": "Events › By place › Europe"}}, {"year": 893, "year_label": "893 CE", "section": "Conflict & Security", "date": null, "text": "Vladimir, ruler (khan) of the Bulgarian Empire, is dethroned by his father Boris I, with help from loyal boyars. He is blinded, and succeeded by his brother Simeon I, as prince of Bulgaria; the capital is moved from Pliska to Preslav. Simeon makes an alliance with the Pechenegs (or Patzinaks), a semi-nomad Turkic tribe from the Central Asian steppes.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1364917563#Europe", "title": "893", "revid": 1364917563, "section": "Events › By place › Europe"}}, {"year": 907, "year_label": "907 CE", "section": "Deaths", "date": "May 2", "text": "May 2 – Boris I, ruler (knyaz) of the Bulgarian Empire", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1341130849#Deaths", "title": "907", "revid": 1341130849, "section": "Deaths"}}]}