The Duke Emmanuel Philibert, Duke of Savoy was one of the leaders of the Habsburg armies of his cousin Phillip II of Spain; they decisively defeated the French armies in the Battle of Saint-Quentin in Northern France on August 10, 1557. The battle took place on the day of St Lawrence (San Lorenzo), and helped shaped the outcome of the Treaty of Cateau-Cambrésis; in which, the Savoy, including Turin, was returned to the rule of the mercenary Duke. This saint’s day for this battle also gave name and shape to Phillip’s palace of El Escorial. Emmanuel Philibert on his return to Turin in 1562, renovated the old ducal chapel of Santa Maria ad Presepae (still present near the entrance), and created this church dedicated St. Lawrence. Construction of the church we see today began in 1634.