Ernest Augustus II, Duke of Saxe-Weimar-Eisenach

Ernest Augustus II
Duke of Saxe-Weimar and Eisenach
Duke of Saxe-Weimar
Reign 17481758
Predecessor Ernest Augustus I
Successor Charles Augustus
Regent Duke Francis Josias
Duke Frederick III
Duke of Saxe-Eisenach
Reign 1748-1758
Predecessor Ernest Augustus I
Successor Charles Augustus
Regent Duke Francis Josias
Born (1737-06-02)2 June 1737
Died 28 May 1758(1758-05-28) (aged 20)
Spouse Anna Amalia of Brunswick-Wolfenbüttel
Issue Charles Augustus
Prince Frederick Ferdinand
Full name
(German: Ernst August II Konstantin)
(English: Ernest Augustus II Constantine)
House House of Saxe-Weimar-Eisenach
Father Ernst August I, Duke of Saxe-Weimar
Mother Sophie Charlotte of Brandenburg-Bayreuth
Religion Lutheranism

Ernst August II Konstantin, Duke of Saxe-Weimar-Eisenach (2 June 1737 28 May 1758), was a duke of Saxe-Weimar-Eisenach.


He was the second (fifth in order of birth) but eldest and only surviving son of Ernst August I, Duke of Saxe-Weimar by his second marriage to Sophie Charlotte of Brandenburg-Bayreuth, eldest daughter of Georg Friedrich Karl, Margrave of Brandenburg-Bayreuth.

Ernst August II Konstantin's father, a splendor-loving ruler with a passion for hunting, had moved his court to Eisenach. The duke neglected his son and heir, so that Ernst August II Konstantin spent his early years under the supervision of the Hofmarschall of Schloss Belvedere in Weimar.

Duke Ernest Augustus II Constantine on horseback by Johann Friedrich Löber, ca. 1756, National Museum in Warsaw. The young duke was depicted accompanied by his chancellor Heinrich von Bünau before his main residence - Weimar City Castle.

Ernst August I died in 1748, when Ernst August II Konstantin was eleven years old. Since he was still a minor, the dukes Frederick III of Saxe-Gotha-Altenburg and Franz Josias of Saxe-Coburg-Saalfeld assumed the regency of Saxe-Weimar-Eisenach on Ernst August II Konstantin's behalf. The young duke came to live with Duke Frederick in Gotha, who made sure that Ernst August II Konstantin received an appropriate education.

In 1755 Ernst August II Konstantin assumed the reins of government. He appointed his former tutor, the Imperial Count (Reichsgräf) Heinrich von Bünau, as his new chancellor. Because the young duke had been a sickly child, he was encouraged to marry quickly in order to ensure an heir for the duchy.

In Brunswick on 16 March 1756, Ernst August II Konstantin married Anna Amalia of Brunswick-Wolfenbüttel. They had two sons:

  1. Karl August, Duke of Saxe-Weimar-Eisenach, Grand Duke from 21 April 1815 (b. Weimar, 3 September 1757 d. Graditz, 14 June 1828).
  2. Frederick Ferdinand Constantine (b. posthumously, Weimar, 8 September 1758 d. Wiebelskirchen, 6 September 1793) who died unmarried.

When Ernst August II Konstantin died, the hereditary prince Karl August was still an infant. Ernst August Konstantin's widow, the duchess Anna Amalia, presided as regent over an excellent tutelary government which propelled Weimar into the classical period.


Preceded by
Ernst August I
Duke of Saxe-Weimar
Succeeded by
Karl August
Duke of Saxe-Eisenach
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