John Adolphus, Duke of Schleswig-Holstein-Sonderburg-Plön

He was born on 8 April 1634 in Ahrensbök, the eldest son of the first Duke of Plön, Joachim Ernest and Dorothea Augusta of Schleswig-Holstein-Gottorp.

From 1645 to 1650 he went on a grand tour around the countries of Europe, including England and France. 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 the Order of the Elephant, the highest Danish order of knighthood, becoming the 124th member of the order.

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

In 1704 went to Hungary and fought against the Kurucs with the forces of Holstein-Plön and Denmark. He participated in the battle of Smolenice.

John Adolphus married Dorothea of Brunswick-Wolfenbüttel, a daughter of Rudolf 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 of Frederick, Duke of Schleswig-Holstein-Sonderburg-Norburg.

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

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

Duke John Adolphus died on 2 July 1704 in Ruhleben, 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 the John Adolphus' nephew, Joachim Frederick, from the line of Schleswig-Holstein-Nordborg.

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| 1= 1. John Adolphus, Duke of Schleswig-Holstein-Sonderburg-Plön

| 2= 2. Joachim Ernest, Duke of Schleswig-Holstein-Sonderburg-Plön

| 3= 3. Dorothea Augusta of Schleswig-Holstein-Gottorp

| 4= 4. John II, Duke of Schleswig-Holstein-Sonderburg

| 5= 5. Agnes Hedwig of Anhalt

| 6= 6. John Adolf, Duke of Holstein-Gottorp

| 7= 7. Augusta of Denmark

| 8= 8. Christian III of Denmark (=28)

| 9= 9. Dorothea of Saxe-Lauenburg (=29)

| 10= 10. Joachim Ernest, Prince of Anhalt

| 11= 11. Eleonore of Württemberg

| 12= 12. Adolf, Duke of Holstein-Gottorp

| 13= 13. Christine of Hesse

| 14= 14. Frederick II of Denmark

| 15= 15. Sophie of Mecklenburg-Güstrow

| 16= 16. Frederick I of Denmark (=24)

| 17= 17. Anna of Brandenburg

| 18= 18. Magnus I, Duke of Saxe-Lauenburg

| 19= 19. Catherine of Brunswick-Wolfenbüttel

| 20= 20. John V, Prince of Anhalt-Zerbst

| 21= 21. Margaret of Brandenburg

| 22= 22. Christoph, Duke of Württemberg

| 23= 23. Anna Maria of Brandenburg-Ansbach

| 24= 24. Frederick I of Denmark (=16)

| 25= 25. Sophie of Pomerania

| 26= 26. Philip I, Landgrave of Hesse

| 27= 27. Christine of Saxony

| 28= 28. Christian III of Denmark (=8)

| 29= 29. Dorothea of Saxe-Lauenburg (=9)

| 30= 30. Ulrich, Duke of Mecklenburg

| 31= 31. Elizabeth of Denmark

}}

• {{Allgemeine Deutsche Biographie|50|684|686|Johann Adolph, Herzog zu Schleswig-Holstein-Plön|Karl Sommeregger|ADB:Johann Adolf (Herzog von Schleswig-Holstein-Plön)}}

{{commons category|Johann Adolf, Duke of Schleswig-Holstein-Sonderburg-Plön}}

• [http://www.roskildehistorie.dk/stamtavler/konger/6_Enevold/Ploen.htm Family line of Schleswig-Holstein-Plön] {{in lang|de}}
• [http://home.foni.net/~adelsforschung/kavalier.htm The Gentlemen's Tour by Two Princes] {{Webarchive|url=https://web.archive.org/web/20130917170428/http://home.foni.net/~adelsforschung/kavalier.htm |date=2013-09-17 }} {{in lang|de}}
• [http://www.ploener-ansichten.de/gutscheinserie-der-stadt-ploen-1921-50-pfennig/Insights of Plön with a portrait of John Adolphus on emergency money]{{dead link|date=November 2017 |bot=InternetArchiveBot |fix-attempted=yes }} {{in lang|de}}

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{{s-hou|House of Oldenburg|8 April|1634|2 July|1704}}

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{{succession box|before=Joachim Ernest|after=Leopold Augustus|title=Duke of Schleswig-Holstein-Sonderburg-Plön|years=1671–1704}}

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Category:Dukes of Schleswig-Holstein-Sonderburg-Plön

Category:1634 births

Category:1704 deaths

Category:Generals of the Holy Roman Empire