Rainier I of Monaco, Lord of Cagnes
Rainier I of Monaco (1267–1314) was the first sovereign Grimaldi ruler of the area now known as Monaco. He also held the title of Lord of Cagnes. Cagnes was the town where in 1309 he established a stronghold, today known as the Château Grimaldi Additionally, he was Baron of San Demetrio (Kingdom of Naples). He was the eldest of the three sons of Lanfranco Grimaldi, French Vicar of Provence, by his wife, Aurelia del Carretto (who later remarried her husband's cousin, François Grimaldi).
| Rainier I | |
|---|---|
| Lord of Cagnes | |
 Rainier I of Monaco. | |
| Born | c. 1267 Genoa, Republic of Genoa |
| Died | 1314 (aged 46–47) Naples, Kingdom of Naples |
| Noble family | Grimaldi |
| Salvatica del Carretto Andriola Grillo | |
| Issue | |
| Father | Lanfranco Grimaldi |
| Mother | Aurelia del Carretto |