sentences:  Menton and Roquebrune broke away from Monaco, leaving the Grimaldi's already small country hugely diminished—little more than Monte Carlo.Florestan died in 1856 and his son, Charles, who had already been ruling what remained of Monaco, succeeded him as Charles III ("Illustration 15").Menton and Roquebrune officially became part of France in 1861, reducing Monaco's size at a stroke by 80%.