What is 1091?
{{Use mdy dates|date=January 2013}} {{Year nav|1091}} {{Year in various calendars|1091}} {{Year article header|1091}} [[File:Roger I of Sicily (Troina).jpg|thumb|alt=Roger I of Sicily (r. 1071–1101) |Roger I of Sicily (r. 1071–1101)]] == Events == === By area === ==== Europe ==== * King [[William II of England]] invades [[Normandy]]. * [[Ladislaus I of Hungary]] occupies [[Slavonia]]. * King [[Stjepan II of Croatia]], the last member of the [[Trpimirović dynasty]], died without leaving anyone to inherit his thrown and title. ===== British Isles ===== * [[October 17]] &ndash; [[London Tornado of 1091]]: A [[TORRO Scale|T8]]/[[Fujita scale|F4]] [[tornado]] is recorded in [[St Mary-le-Bow]] of [[London, England]]; the storm destroys [[London Bridge]]. * [[Henry I of England|Henry]], the third son of [[William I of England|William the Conqueror]], is forced to give up his property of [[Cotentin]] in Normandy after his two older brothers, William Rufus and [[Robert Curthose]], make a peace agreement. * King [[Malcolm III of Scotland]] makes an unsuccessful attempt to invade English territory, but is finally forced to give a public statement of allegiance to King [[William II of England]]. * [[Cardiff Castle]] is built. ===== Mediterranean ===== * [[April 29]] &ndash; [[Battle of Levounion]]: The [[Pecheneg]]s surround and attack [[Constantinople]], but are defeated so completely by [[Emperor Alexius I]] that they are completely eliminated. * February; With the taking of [[Noto]], the [[Normans]] complete the 30 year long takeover of [[Sicily]] from the [[Islam]]ic rulers. * The Islamic [[Abbadid]] dynasty ruling in [[Spain]] falls when the [[Almoravid dynasty|Almoravids]] storm [[Seville]]. Faced with this new threat, the king of [[Badajoz]], [[al-Mutawakkil ibn al-Aftas]], got the support of [[kingdom of Castile|Castile]] in exchange for the Muslim positions on the [[Tagus]] river — [[Sintra]], [[Santarém, Portugal|Santarém]] and [[Lisbon]].<ref name=picard2000>{{cite book|last=Picard|first=Christophe|title=Le