1252

Template:Use mdy dates Template:About year Template:Year nav Template:C13 year in topicYear 1252 (MCCLII) was a leap year starting on Monday of the Julian calendar.

Events

By place

Europe

• April 6 – Saint Peter of Verona is assassinated by Carino of Balsamo.<ref name=":0c">Template:Cite book</ref><ref name=":1">Template:Cite book</ref>
• May 15 – Pope Innocent IV issues the papal bull Ad exstirpanda, which authorizes the torture of heretics in the Medieval Inquisition. Torture quickly gains widespread usage across Catholic Europe.<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
• June 1 – Alfonso X is proclaimed king of Castile and León.<ref>Template:Cite book</ref>
• July – The settlement of Stockholm in Sweden is founded, by Birger Jarl.<ref>Template:Cite book</ref><ref>Template:Cite journal</ref>
• December 25 – Christopher I of Denmark is crowned King of Denmark, in the Lund Cathedral.<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
• The Polish land of Lebus is incorporated into the German state of Brandenburg, marking the start of Brandenburg's expansion into previously Polish areas (Neumark).<ref>Template:Cite book</ref>
• The Lithuanian city of Klaipėda (Memel) is founded by the Teutonic Knights.<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
• The town and monastery of Orval Abbey in Belgium burn to the ground; rebuilding takes 100 years.<ref>Template:Cite book</ref>
• Thomas Aquinas travels to the University of Paris, to begin his studies there for a master's degree.<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
• In astronomy, work begins on the recording of the Alfonsine tables.<ref>Template:Cite book</ref>

Asia

• The classic Japanese text Jikkunsho is completed.<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
• The Chinese era Chunyou ends<ref>Template:Cite book</ref> (→ Emperor Lizong).
• Mongol conquest of the Song dynasty: the Mongols take the westernmost province of the Song dynasty empire.<ref>Template:Cite book</ref>
• New Mongol invasion of Tibet.

Births

• March 25 – Conradin, Duke of Swabia (d. 1268)<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
• Safi-ad-din Ardabili, Persian Sufi leader<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
• Eleanor de Montfort, Princess of Wales, English-born consort (d. 1282)<ref>Template:Cite book</ref><ref>Template:Cite book</ref>

Deaths

• January 1 – Saint Zdislava Berka, Bohemian lay Dominican benefactress<ref>Template:Cite book</ref>
• January 23 – Isabella, Queen of Armenia<ref>Template:Cite book</ref>
• January – Bohemond V, Prince of Antioch<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
• February 3 – Sviatoslav III of Vladimir, Prince of Novgorod (b. 1196)<ref>Template:Cite book</ref>
• April 1 – Kujō Michiie, Japanese regent<ref>Template:Cite book</ref>
• April 6 – Saint Peter of Verona<ref name=":1" />
• May 3 or May 4 – Günther von Wüllersleben, Grand Master of the Teutonic Knights<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
• May 30 – King Ferdinand III of Castile and Leon<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
• June 6 – Robert Passelewe, Bishop of Chichester<ref>Template:Cite book</ref>
• June 9 – Otto I, Duke of Brunswick-Lüneburg<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
• June 29 – Abel, King of Denmark (b. 1218)<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
• August 1 – Giovanni da Pian del Carpine, Italian chronicler of the Mongol Empire<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
• November 27 – Blanche of Castile, queen of Louis VIII of France and regent of France (b. 1188)<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
• date unknown
  • John of Basingstoke, English scholar and ecclesiastic<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
  • Henry I, Count of Anhalt<ref>Template:Cite book</ref>
  • Sorghaghtani Beki, Mongolian empress and regent<ref>Template:Cite book</ref><ref>Template:Cite book</ref>
  • Catherine Sunesdotter, Swedish queen consort<ref>{{#invoke:citation/CS1|citation

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• • Yesü Möngke, Khan of the Chagatai Khanate<ref>Template:Cite book</ref>