John Adolphus
Duke of Schleswig-Holstein-Sonderburg-Plön
Portrait byJohann Valentin Tischbein
Born	(1634-04-08)8 April 1634 Ahrensbök
Died	2 July 1704(1704-07-02) (aged 70) Ruhleben
Noble family	Oldenburg
Spouse	Dorothea of Brunswick-Wolfenbüttel
Father	Joachim Ernest, Duke of Schleswig-Holstein-Sonderburg-Plön
Mother	Dorothea Augusta of Schleswig-Holstein-Gottorp
Military service
Battles/wars	Franco-Dutch War Battle of Seneffe Nine Years' War Siege of Huy War of the Spanish Succession Battle of Smolenice

John Adolphus of Schleswig-Holstein-Sonderburg-Plön (German:Johann Adolf orHans Adolf; 8 April 1634,Ahrensbök – 2 July 1704Ruhleben) was the secondDuke of Schleswig-Holstein-Sonderburg-Plön, which had been created by a division of theDuchy of Schleswig-Holstein-Sonderburg.

He was born on 8 April 1634 inAhrensbök, the eldest son of the first Duke of Plön,Joachim Ernest andDorothea Augusta of Schleswig-Holstein-Gottorp.

From 1645 to 1650 he went on agrand tour around the countries of Europe, includingEngland andFrance. He was accompanied by his brother, Augustus, who was one year younger. In 1671 he inherited the dukedom from his father. On 25 October 1671 he was bestowed with theOrder of the Elephant, the highest Danish order of knighthood, becoming the 124th member of the order.

In 1684 he had the firsthunting lodge built inTraventhal; this was followed in 1685 bySt. John's Church, Plön and in 1690 the parish church of Plön. In 1694 he led the Dutch army at theSiege of Huy. John Adolphus took part in several of the major wars of his time, including theOttoman wars and handed over the running of his duchy during those times largely to his mother and his wife. During his reign theTreaty of Traventhal was signed at the ducal hunting lodge inTraventhal, a milestone during theGreat Northern War.

In 1704 went toHungary and fought against theKurucs with the forces of Holstein-Plön and Denmark. He participated in thebattle of Smolenice.

John Adolphus married Dorothea ofBrunswick-Wolfenbüttel, a daughter ofRudolf Augustus of Brunswick-Wolfenbüttel. They had two children:

• Adolphus Augustus (born 29 March 1680; died 29 June 1704), married Elisabeth Sophia of Schleswig-Holstein-Sonderburg-Nordborg (1683–1767). She was the daughter of Rudolf of Schleswig-Holstein-Sonderburg-Norburg, and granddaughter ofFrederick, Duke of Schleswig-Holstein-Sonderburg-Norburg.

• their son, Leopold Augustus (1702-1706), died as a child

• Dorothea Sophia (1692–1765), marriedAdolphus Frederick III, Duke of Mecklenburg

Duke John Adolphus died on 2 July 1704 inRuhleben, a few days after his son, Adolphus Augustus, had been killed in a riding accident. Because Leopold Augustus, son of Adolphus Augustus and grandson of John Adolphus died in childhood in 1706, the estate went to John Adolphus' nephew,Joachim Frederick, from the line ofSchleswig-Holstein-Nordborg.

• Karl Sommeregger (1905). "Johann Adolph, Herzog zu Schleswig-Holstein-Plön".Allgemeine Deutsche Biographie (in German). Vol. 50. Leipzig: Duncker & Humblot. pp. 684–686.

Wikimedia Commons has media related toJohann Adolf, Duke of Schleswig-Holstein-Sonderburg-Plön.

• Family line of Schleswig-Holstein-Plön(in German)
• The Gentlemen's Tour by Two PrincesArchived 2013-09-17 at theWayback Machine(in German)
• of Plön with a portrait of John Adolphus on emergency money^{[permanent dead link]}(in German)

• Dukes of Schleswig-Holstein-Sonderburg-Plön
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• 1704 deaths
• Generals of the Holy Roman Empire

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