Sweyn III of Denmark
| Sweyn III Grathe | |||||
|---|---|---|---|---|---|
Illustration of Sweyn III in the 13th-century Saxon World Chronicle | |||||
| King of Denmark | |||||
| Reign | 1146–1157 | ||||
| Predecessor | Eric III Lamb | ||||
| Successor | Valdemar I the Great | ||||
| Co-kings | Canute V (from 1146), Valdemar I the Great (from 1154) | ||||
| Born | c. 1125 | ||||
| Died | 23 October 1157 (aged 31–32) Grathe Heath, Denmark | ||||
| Burial | Gradehede, then Viborg Cathedral | ||||
| Consort | Adela of Meissen | ||||
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| House | Estridsen | ||||
| Father | Eric II the Memorable | ||||
| Mother | Thunna | ||||
Sweyn III Grathe (Danish: Svend III Grathe; c. 1125 – 23 October 1157) was the king of Denmark between 1146 and 1157, in shifting alliances with Canute V and his own cousin Valdemar I. In 1157, the three agreed to a tripartition of Denmark. Sweyn attempted to kill his rivals at the peace banquet, and was subsequently defeated by Valdemar I at the Battle of Grathe Heath and killed.