Question: Where was the husband of Joanna Elisabeth Of Holstein-Gottorp born?

Knowledge 1: Joanna Elisabeth of Holstein-Gottorp
Johanna Elisabeth of Holstein-Gottorp (24 October 1712 – 30 May 1760) was a German regent, Princess of Anhalt-Zerbst by marriage to Christian August, Prince of Anhalt-Zerbst, and regent of Anhalt-Zerbst from 1747 to 1752 for her minor son, Frederick Augustus.She is best known as the mother of Catherine the Great of Russia.She was born at Gottorp, the daughter of Christian August, Duke of Holstein-Gottorp and Albertina Frederica of Baden-Durlach. [SEP] Knowledge 2: Christian August, Prince of Anhalt-Zerbst
Christian August, Prince of Anhalt-Zerbst (29 November 1690, in Dornburg – 16 March 1747, in Zerbst) was a German prince of the House of Ascania.He was a ruler of the Principality of Anhalt-Dornburg, then, from 1742, a ruler of the entire Principality of Anhalt-Zerbst.He was also a Prussian "Generalfeldmarschall", but is best known for being the father of Catherine the Great of Russia.
Knowledge 1: Joanna Elisabeth of Holstein-Gottorp
Johanna Elisabeth of Holstein-Gottorp (24 October 1712 – 30 May 1760) was a German regent, Princess of Anhalt-Zerbst by marriage to Christian August, Prince of Anhalt-Zerbst, and regent of Anhalt-Zerbst from 1747 to 1752 for her minor son, Frederick Augustus.She is best known as the mother of Catherine the Great of Russia.She was born at Gottorp, the daughter of Christian August, Duke of Holstein-Gottorp and Albertina Frederica of Baden-Durlach. [SEP] Knowledge 2: Christian August of Holstein-Gottorp, Prince of Eutin
Christian August of Holstein-Gottorp-Eutin (11 January 1673 – 24 April 1726) was a cadet of the reigning ducal House of Holstein-Gottorp who became prince of Eutin, prince-bishop of Lübeck and regent of the Duchy of Holstein-Gottorp.He was the father of Adolf Frederick, King of Sweden, and the maternal grandfather of Catherine the Great, Empress of Russia.
Knowledge 1: Joanna Elisabeth of Holstein-Gottorp
Johanna Elisabeth of Holstein-Gottorp (24 October 1712 – 30 May 1760) was a German regent, Princess of Anhalt-Zerbst by marriage to Christian August, Prince of Anhalt-Zerbst, and regent of Anhalt-Zerbst from 1747 to 1752 for her minor son, Frederick Augustus.She is best known as the mother of Catherine the Great of Russia.She was born at Gottorp, the daughter of Christian August, Duke of Holstein-Gottorp and Albertina Frederica of Baden-Durlach. [SEP] Knowledge 2: Adolf, Duke of Holstein-Gottorp
Adolf of Denmark or Adolf of Holstein-Gottorp (25 January 1526 – 1 October 1586) was the first Duke of Holstein-Gottorp from the line of Holstein-Gottorp of the House of Oldenburg.He was the third son of King Frederick I of Denmark and his second wife, Sophie of Pomerania.King Frederick I had his son educated by Philip I, Landgrave of Hesse.He spent four years at the Landgrave's castle in Kassel.In 1544, Adolf, his brother Johann, and their half-brother King Christian III of Denmark, divided the duchies of Schleswig and Holstein.The areas were divided according to approximately equal tax proceeds.Adolf, as the youngest, was entitled the first choice.Since he selected the part with the castle Gottorp, the line of the house Oldenburg created by him was called "Schleswig-Holstein-Gottorp".

Answer: Dornburg