Louis Antoine Lon de SaintJust was a military and political leader during the French Revolution. The youngest of the deputies elected to the National Convention in 1792, SaintJust rose quickly in their ranks and became a major leader of the government of the French First Republic. He spearheaded the movement to execute King Louis XVI and later drafted the radical French Constitution of 1793.
Louis Antoine de SaintJust was born at Decize in the former Nivernais province of central France. He was the eldest child of Louis Jean de SaintJust de Richebourg , a retired French cavalry officer, knight of the Order of Saint Louis, and of the 20years younger MarieAnne Robinot , the daughter of a notary. He had two younger sisters, born in 1768 and 1769. The family later moved north and in 1776 settled in the village of Blrancourt in the former Picardy province, establishing themselves as a countryside noble family living out of the rents from their land. A year after the move, Louis Antoines father died leaving his mother with the three children. She saved diligently for her only sons education, and in 1779 he was sent to the Oratorian school at Soissons. After a promising start, SaintJust acquired a reputation as a troublemaker, augmented by infamous stories of how he led a students rebellion and tried to burn down the school. Nonetheless, he earned his graduation in 1786.
Source: Wikipedia