Ferdinand III of the Holy Roman Empire was born on July 13, 1608, and became the Holy Roman Emperor in 1637. He was the son of Ferdinand II and played a significant role during the Thirty Years' War, a conflict that deeply affected Europe. His reign focused on restoring peace and stability within the empire. Ferdinand III is known for his efforts in diplomacy, which led to the Peace of Westphalia in 1648, ending the Thirty Years' War. He worked to strengthen the central authority of the empire while balancing the interests of various states and territories within it.