Heinrich I of Schwarzburg was a nobleman who lived during the 13th century. He belonged to the House of Schwarzburg, a prominent family in the region of Thuringia, Germany. Heinrich I is known for his role in local politics and his efforts to strengthen the influence of his family. Heinrich I's reign marked a period of territorial expansion and consolidation for the Schwarzburg family. He played a significant part in the feudal system of the time, navigating alliances and conflicts with neighboring lords to secure his family's power and land.