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Boniface I | |
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![]() Boniface elected as leader of the Fourth Crusade, Soissons, 1201: history painting by Henri Decaisne, early 1840s, Salles des Croisades, Versailles. | |
Marquis of Montferrat | |
Reign | 1192–4 September 1207 |
Predecessor | Conrad of Montferrat |
Successor | William VI, Marquis of Montferrat |
King of Thessalonica | |
Reign | 1205–4 September 1207 |
Successor | Demetrius of Montferrat |
Born | c. 1150 |
Died | 4 September 1207 |
Spouse | Helena del Bosco Margaret of Hungary |
Issue | William VI, Marquis of Montferrat Beatrice of Montferrat Agnes of Montferrat Demetrius of Montferrat |
House | Aleramici |
Father | William V, Marquis of Montferrat |
Mother | Judith of Babenberg |
Boniface I, usually known as Boniface of Montferrat (Italian: Bonifacio del Monferrato; Greek: Βονιφάτιος Μομφερρατικός, Vonifatios Momferratikos) (c. 1150 – 4 September 1207), was the ninth Marquis of Montferrat (from 1192), a leader of the Fourth Crusade (1201–04) and the king of Thessalonica (from 1205).