Count Ulrich I was a nobleman from the House of Württemberg, a prominent family in medieval Germany. He ruled as Count of Württemberg from 1265 until his death in 1279. His reign was marked by efforts to consolidate power and expand his territory, which laid the groundwork for the future growth of the Duchy of Württemberg. Ulrich I is known for his strategic marriages and alliances, which helped strengthen his position among other regional powers. He was also involved in various conflicts, typical of the era, as he sought to protect and enhance his family's influence in the region.