Princess Adelheid was a historical figure from the 11th century, known for her noble lineage and significant role in European politics. She was the daughter of Duke Henry the Proud and married King Lothair III of Germany, which strengthened alliances between powerful families during a time of political turmoil. Adelheid was also recognized for her piety and charitable works. She was involved in the founding of several monasteries and promoted the Christian faith throughout her realm. Her legacy includes contributions to both the spiritual and political landscape of medieval Europe, making her an important figure in history.