TDIH - February 14 This Day in (Medieval) History: February 14 869 – Death of Cyril, Bishop and missionary to the Slavs. 748 – The city of Merv was taken by Hashimi rebels led by Abu Muslim Khorasani. 842 – A military pact is agreed upon by Charles the Bald and Louis the German against their brother and legal heir Lothair I. 1009 – Death of Bruno of Querfurt, Bishop and missionary to the Prussians. 1014 – Henry of Bavaria was crowned Holy Roman Emperor. 1076 – Henry IV, Holy Roman Emperor, was excommunicated by Pope Gregory VII. 1130 – Gregorio Papareschi was chosen as Pope by the cardinals, taking the name Innocent II. 1140 – Death of Leo I, lord of Armenian Cilicia. 1140 – Death of Duke Sobeslav I of Bohemia. 1164 – Death of Sviatoslav Olgovich, Prince of Novgorod, Novgorod-Seversky, Belgorod Kievsky, and Chernigov. 1229 – Death of R?gnvaldr Guðrøðarson, king of the Isles. 1317 – Death of Margaret of France, wife of King Edward I of England. 1349 – Anti-Jewish mobs burned several hundred Jews in Strasbourg. 1400 – Death of King Richard II of England. 1404 – Birth of Leon Battista Alberti, Italian priest, author, architect, poet, artist, linguist, and philosopher. 1408 – Birth of John FitzAlan, Earl of Arundel. 1440 – Death of Dietrich of Oldenburg, Count of Delmenhorst and Oldenburg. 1452 – Birth of Pandolfo Petrucci, who later seized control of the Republic of Siena, Italy. 1468 – Birth of Johannes Werner, German priest, geographer, astronomer and mathematician. 1489 – Death of Nicolaus von Tungen, Prince-Bishop of Warmia. 1528 – Death of Edzard I, Count of East Frisia.