Christopher I, King of Denmark
| Reign | June 29, 1252 - May 29, 1259 (6 years) |
| Coronation | December 25, 1252 |
| Predecessor | Abel of Denmark |
| Successor | Eric V of Denmark |
| Full Name | Christopher Valdemarsen |
| House | House of Estridsen |
| Birth | 1219 |
| Father | Valdemar II of Denmark (1170-1241) |
| Mother | Berengaria, Infanta of Portugal (1191-1221) |
| Brothers |
Valdemar, Crown Prince of Denmark (1209-1231, Paternal Half-Brother) Eric IV of Denmark (1216-1250) Abel of Denmark (1218-1252) |
| Sisters | Sophie, Margravine of Brandenburg (1217-1247) |
| Paternal Grandparents |
Valdemar I of Denmark (1131-1182) Sophia, Princess of Minsk (1140-1198) |
| Maternal Grandparents |
Sancho I, King of Portugal (1154-1212) Dulce, Infanta of Aragon (1160-1198) |
| Death |
May 29, 1259 Ribe, Denmark (40 years) |
| Margaret Sambiria, Duchess of Pomerania (1230-1282) |
Married 1248 (11 years) |
|
(m.1273 Agnes, Margrave of Brandenburg) (3 sons, 4 daughters) |
Born 1249 Died November 22, 1286 (37 years) |
|
Matilda, Princess of Denmark (m.1268 Albert III, Margrave of Brandenburg-Salzwedel) (2 sons, 2 daughters) |
Born 1250 Died 1300 (50 years) |
| Niels, Prince of Denmark |
Born 1251 Died 1259 (8 years) |
| Valdemar, Prince of Denmark |
Born 1254 Died 1254 (1 day) |
|
Margaret, Princess of Denmark (m.1275 John II, Count of Holstein-Kiel) (2 sons) |
Born 1257 Died 1306 (49 years) |