Fourier was born on 30 November 1565 in the village of Mirecourt, in what was then the Duchy of Lorraine, a part of the Holy Roman Empire (now the French department of Vosges), which was a bulwark of the Catholic Counter-Reformation. He was the eldest of the three sons of a cloth merchant and his wife, who were faithful Catholics. At the age of 15, his father enrolled him in the new Jesuit University of Pont-à-Mousson (eventually merged into the University of Lorraine).