Adolph VI, Count of Holstein-Schauenburg (1256–1315) was the ruling Count of Holstein-Pinneberg and Schaumburg from 1290 until his death. He was the third son of Gerhard I and Elisabeth of Mecklenburg and was married to Helen of Saxe-Lauenburg, daughter of John I, Duke of Saxony. 
Reign.
When Gerhard I died in 1290, his sons divided the inheritance. Adolph VI received Holstein-Pinneberg and the ancestral County of Schaumburg. Adolph is considered the founder of the younger Schauenburg line; his brothers founded the Holstein-Plön and Holstein-Rendsburg lines.
In 1298, he granted a charter to the city of Gehrden. In 1302, he began construction of the water castle at Bückeburg to defend the main trade route. The castle was named after a castle in the Obernkirchen area; the name was first mentioned in a document in 1304.
Seal.
His seal (see picture) reads:
"Seal of Adolph, Count of Schauenburg"