page_title: Theodore II Laskaris
section_title: First administrative tasks
hierarchical_section_title: Theodore II Laskaris / Youth / First administrative tasks
caption_attribution_description: English: John III Doukas Vatatzes, Emperor of Nicaea (1222–1254) Ελληνικά: Ο αυτοκράτορας της Νίκαιας Ιωάννης Γ' Βατάτζης (1222–1254)
context_page_description: Theodore II Doukas Laskaris or Ducas Lascaris was Emperor of Nicaea from 1254 to 1258. He was the only child of Emperor John III Doukas Vatatzes and Empress Irene Laskarina. His mother was the eldest daughter of Theodore I Laskaris who had established the Empire of Nicaea as a successor state to the Byzantine Empire in Asia Minor, after the crusaders captured the Byzantine capital, Constantinople, during the Fourth Crusade in 1204. Theodore received an excellent education from two renowned scholars, Nikephoros Blemmydes and George Akropolites. He made friends with young intellectuals, especially with a page of low birth, George Mouzalon. Theodore began to write treatises on theological, historical and philosophical themes in his youth.
  Emperor John III arranged for Theodore to marry Elena of Bulgaria in 1235, to forge an alliance with her father, Ivan Asen II, against the Latin Empire of Constantinople. According to Theodore himself, their marriage was happy, and they had five or six children. From 1241, Theodore acted as his father's lieutenant in Asia Minor during his frequent military campaigns in the Balkan Peninsula.
context_section_description: If Vatatzes followed the practice of his predecessors, Theodore was proclaimed co-ruler while still a child. In his history, Akropolites mentioned Theodore as a co-emperor when narrating events that occurred from 1235 to 1237 and in 1242. In his correspondence, Theodore referred to himself as "my imperial majesty" from around 1242. He was not crowned during his father's lifetime—a likely explanation for the denial of his co-emperorship by two later Byzantine historians, George Pachymeres and Nicephorus Gregoras. Theodore's authority was considerable: he granted estates and salaries and intervened in legal disputes. On Blemmydes' petition, he ordered Nikephoros, the metropolitan bishop of Ephesus, to return an allegedly unlawfully purchased piece of land to Blemmydes' monastery. During his father's absence, he presided over sessions of the privy council and proposed candidates to vacant Church offices.
  John III Vatatzes again laid siege to Constantinople in May 1241, but he quickly realized he could not capture the city. He started peace negotiations, and Theodore accompanied his father to the meetings with the Latin envoys. They signed a two-year truce on 24 June. John II Asen died in the same month and his death weakened Bulgaria. Vatatzes launched a military campaign against the Bulgarians' Epirote allies late in 1241. Before departing for the military campaign, he appointed Theodore his lieutenant in Asia Minor. Theodore, like his father and grandfather, held an itinerant court and visited most Anatolian towns and villages.
  At this time, a Mongol general, Baiju, invaded Nicaea's eastern neighbor, the Seljuk Sultanate of Rum, from the east and captured Erzurum. Theodore informed his father, who was besieging Thessalonica, but Vatatzes did not abandon the siege. His persistence was rewarded when the ruler of Thessalonica John Komnenos Doukas renounced the title of emperor in return for the Byzantine court title of despot from Vatatzes. The Mongols launched a new military campaign against the Seljuks and routed Sultan Kaykhusraw II at the Battle of Köse Dağ on 26 June 1243. After the Seljuks agreed to pay a yearly tribute to the Mongols, Nicaea remained the only Anatolian state that preserved full independence. The fear of a Mongol invasion became a constant element of Nicaean diplomacy.
  Vatatzes again charged Theodore with the administration of Asia Minor when he launched a new military campaign in Thrace in 1246. After Vatatzes captured Serres, the leading citizens of Thessalonica did not risk a prolonged siege. They opened the gates of their city and paid voluntary homage to Vatatzes. As most Macedonian towns followed their example, Vatatzes almost doubled his empire's territory.
caption: John III Vatatzes.
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