Adolf III of Holstein

Adolf III of Holstein
Statue of Adolf III by Engelbert Peiffer, on the Trostbrücke in Hamburg
Spouse(s)	Adelheid of Assel Adelheid of Querfurt
Noble family	House of Schauenburg
Father	Adolf II of Holstein
Mother	Mechthild of Schwarzburg-Käfernburg
Born	1160
Died	3 January 1225(1225-01-03)

Adolf III, Count of Schauenburg and Holstein (1160 – 3 January 1225) was the ruler of the Counties of Schauenburg and Holstein. He is particularly remembered for his establishment of a new settlement for traders on the banks of the Alster near the Neue Burg in Hamburg.

Adolf III was the only son of Count Adolf II of Holstein-Wagria and succeeded him in 1164, initially under the guardianship of his mother Mechthild of Schwarzburg-Käfernburg, a daughter of Count Sizzo III of Schwarzburg-Käfernburg.

Count Adolf III at first supported Henry the Lion. He accompanied him on his expedition against Philipp von Heinsberg, Archbishop of Cologne, fought at the Battle of Halerfeld on 1 August 1180 (to the north-west of Osnabrück) at the side of Count Bernhard I of Ratzeburg, when he received from Henry the Lion the decisive rights in the region of the Middle Weser which formed the basis of the County of Schauenburg.

In 1180 however Adolf defected from Henry, who thereupon drove him from Holstein. Adolf attached himself to Frederick Barbarossa (Emperor Frederick I), with whose help he regained his lordship in 1181 after the fall of Henry. In 1188 however Frederick turned down Adolf's claim to the town of Lübeck. Adolf accompanied him on the Third Crusade. In August 1190 he reached Tyre, where he left the crusading army and returned to Holstein to defend his lands against Henry the Lion, who had in the meantime returned from exile.

The reign of Adolf III coincided with Denmark's attempts at expansion under Kings Canute VI and his brother and successor Valdemar II. After Adolf lost the Battle of Stellau in 1201 and was later taken prisoner in Hamburg by Valdemar, this expansion was successful for some decades. In captivity Adolf was forced to renounce his title to the County of Holstein in 1203 in order to gain his freedom, and on his release retired to the County of Schauenburg. The reconquest of Holstein was left for his son and heir, Adolf IV of Holstein.