Bernard of Clairvaux was a prominent 12th-century French monk and theologian, known for founding the Cistercian order. Born in 1090 in Fontaine-lès-Dijon, he entered a monastery at a young age and quickly gained a reputation for his piety and leadership. Bernard played a crucial role in promoting the Cistercian reform movement, emphasizing simplicity and a return to monastic ideals. He was also influential in the broader Christian community, advising popes and kings. Bernard's writings, particularly on spirituality and mysticism, have had a lasting impact on Christian thought. He is recognized as a saint in the Catholic Church and is celebrated for his deep devotion and theological insights.