Rudolf I of Habsburg was a significant figure in European history, born in 1218. He became the King of the Romans in 1273 and was the first ruler from the House of Habsburg to hold this title. His reign marked the beginning of the Habsburg dynasty's influence in European politics. Rudolf I is best known for his efforts to consolidate power in the Holy Roman Empire. He successfully expanded his territory by acquiring lands in Austria and other regions, which laid the foundation for the Habsburgs' future dominance in Europe. He died in 1291, leaving a lasting legacy.