{"slug": "pope-leo-iv", "label": "Pope Leo IV", "wikipedia": "https://en.wikipedia.org/wiki/Pope_Leo_IV", "wikidata": "https://www.wikidata.org/wiki/Q228205", "qid": "Q228205", "description": "pope of the Catholic Church", "entries": 8, "years": 7, "span": [790, 855], "span_label": ["790 CE", "855 CE"], "topics": [{"title": "Religion & Belief", "count": 4}, {"title": "Deaths", "count": 2}, {"title": "Births", "count": 1}, {"title": "Conflict & Security", "count": 1}], "related": [{"slug": "rome", "label": "Rome", "shared": 4}, {"slug": "holy-roman-emperor", "label": "Holy Roman Emperor", "shared": 1}, {"slug": "defensive-wall", "label": "Defensive wall", "shared": 1}, {"slug": "tiber", "label": "Tiber", "shared": 1}, {"slug": "sardinia", "label": "Sardinia", "shared": 1}, {"slug": "saracen", "label": "Saracen", "shared": 1}, {"slug": "duchy-of-naples", "label": "Duchy of Naples", "shared": 1}, {"slug": "piracy", "label": "Piracy", "shared": 1}, {"slug": "fortification", "label": "Fortification", "shared": 1}, {"slug": "louis-ii-of-italy", "label": "Louis II of Italy", "shared": 1}], "items": [{"year": 790, "year_label": "790 CE", "section": "Births", "date": null, "text": "Leo IV, pope of the Catholic Church (d. 855)", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1340848291#Births", "title": "790", "revid": 1340848291, "section": "Births"}}, {"year": 846, "year_label": "846 CE", "section": "Religion & Belief", "date": null, "text": "Muslim forces attempt to raid Rome but only pillage the countryside around the city before being beaten back by Duke Guy I of Spoleto. In the aftermath, Pope Leo IV starts walling the area around the Vatican hill, creating the Leonine City.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1308185700#Europe", "title": "846", "revid": 1308185700, "section": "Events › By place › Europe"}}, {"year": 847, "year_label": "847 CE", "section": "Religion & Belief", "date": "April 10", "text": "April 10 – Leo IV is consecrated 103rd pope of Rome (where he was born c.790). Because of the sense of urgency driven by the previous year's Arab raid against Rome, he is consecrated without waiting for the consent of the Holy Roman Emperor. He will reign until 855.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1348153742#Religion", "title": "847", "revid": 1348153742, "section": "Events › By topic › Religion"}}, {"year": 848, "year_label": "848 CE", "section": "Religion & Belief", "date": null, "text": "Pope Leo IV builds (on the opposite of the Tiber River) the Leonine City, a fortified three-kilometre wall that encircles the Vatican Hill and Borgo, to defend Rome.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1341129160#Religion", "title": "848", "revid": 1341129160, "section": "Events › By topic › Religion"}}, {"year": 849, "year_label": "849 CE", "section": "Conflict & Security", "date": null, "text": "Summer – Battle of Ostia: A Saracen Arab fleet from Sardinia sets sail towards Rome. In response, Pope Leo IV forms a coalition of maritime Italian cities, including Naples, Amalfi and Gaeta, led by Admiral Caesar — which is assembled off the re-fortified port of Ostia — and repels the Saracen marauders. Their navy is scattered, resulting in many sunken vessels. Rome is saved from plunder and the expansion of the Aghlabids.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1341129155#Europe", "title": "849", "revid": 1341129155, "section": "Events › By place › Europe"}}, {"year": 850, "year_label": "850 CE", "section": "Religion & Belief", "date": null, "text": "King Louis II, the eldest son of Lothair I, is crowned joint emperor by Pope Leo IV at Rome, and becomes co-ruler of the Middle Frankish Kingdom.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1341129147#Europe", "title": "850", "revid": 1341129147, "section": "Events › By place › Europe"}}, {"year": 855, "year_label": "855 CE", "section": "Deaths", "date": "July 17", "text": "July 17 – Leo IV, pope of the Catholic Church (b. 790)", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1350256482#Deaths", "title": "855", "revid": 1350256482, "section": "Deaths"}}, {"year": 855, "year_label": "855 CE", "section": "Deaths", "date": "July 17", "text": "July 17 – Pope Leo IV dies after an 8-year reign, and is succeeded by Benedict III as the 104th pope of Rome. Anastasius is made anti-pope by Lothair I.", "cite": {"url": "https://en.wikipedia.org/w/index.php?oldid=1350256482#Religion", "title": "855", "revid": 1350256482, "section": "Events › By topic › Religion"}}]}