Gaudemunda or Gaudimantė (baptized as Sophia) (1260 (?) – 1288) was Lithuanian princess, daughter of Traidenis, Duke of Kernavė, later Grand Duke of Lithuania. Gaudemunda married duke of Masovia Boleslaw II in 1279. The magnificent Cathedral of Chartres was dedicated in 1260. ... Events February 22 - Nicholas IV becomes Pope. ... Grand Duchy of Lithuania Traidenis (Ruthenian Troyden; Belarusian Trajdzien, Трайдзень; ? - 1281) was the Grand Prince of Lithuania from 1270 till 1282 (or 1269 till 1281), Prince of Jatwez and Doynowsk. ... Birds eye view of KernavÄ— KernavÄ— is a tourist and archeological resort in southeast Lithuania, and was once the medieval capital of the Grand Duchy of Lithuania. ... For broader historical context, see 1270s and 13th century. ...