The County of Holstein was a historical region located in northern Germany. It was part of the larger area known as Schleswig-Holstein and played a significant role in the political landscape of medieval Europe. The county was established in the 12th century and became a center for trade and agriculture. Holstein was ruled by various noble families over the centuries, including the House of Schauenburg. The region's strategic location along trade routes contributed to its economic development. In the 19th century, Holstein became part of the Duchy of Schleswig-Holstein, which was involved in conflicts between Denmark and Germany.