Rainier I of Monaco 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.
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Born: 1267, Genoa, Italy
Died: 1314 (age 47 years), Naples, Italy
Grandchildren: Rainier II, Lord of Monaco, Gabriel, Lord of Monaco, and Louis, Lord of Monaco
Great grandchildren: Jean I, Lord of Monaco, Ambroise, Lord of Monaco, and Anthony II, Lord of Monaco
Father: Lanfranco Grimaldi
Children: Charles I, Lord of Monaco