Francis I of Lorraine (1708-1765) was a significant European ruler, known for being the Holy Roman Emperor from 1745 until his death. He was born into the House of Lorraine and became the husband of Maria Theresa of Austria, which strengthened the ties between their dynasties. As a ruler, Francis I focused on consolidating his power and supporting the arts and sciences. His reign was marked by efforts to modernize the administration of the Holy Roman Empire and to maintain stability during a time of political upheaval in Europe.