Holstein-Pinneberg

Holstein-Pinneberg was a county west of Hamburg, ruled from Pinneberg by a branch of the counts of Schauenburg. In 1337 its count was Adolf VII.

While Christian III of Denmark imposed the Reformation on the rest of Holstein in 1537, Pinneberg remained Catholic until 1559. Count Otto V died without an heir in 1640, ending the Schaumburg line, and the county was absorbed into the Duchy of Holstein. Its northern third was re-granted as the County of Rantzau in 1650.