Having reigned over the Rocher since 1297, the Grimaldi family has an extremely long, rich history.
The Grimaldis are descended from Grimaldo Canella, a twelfth-century statesman from Genoa whose first name became the family surname. Grimaldo Canella served as Consul of Genoa several times and had many descendants who distinguished themselves, particularly at sea.
Having become one of the most powerful families in Genoa, the House of Grimaldi sided with the Pope during the long conflict in medieval Italy which pitted his supporters, the Guelphs, against supporters of the Holy Roman Emperor, the Ghibellines.