of Saxe-Weissenfels, he created in 1699 a Citizens' Company (Bürgerkompanie) with the responsibility of ensuring order during civic celebrations. Moreover, the whole county was measured geodetically; this permitted the city and village churches to reform their training systems. Heinrich was also active as a general and participated in the Great Turkish War. At the siege of Ofen (1684/1686) he distinguished himself together with his brother Christian. After 1687 he vacated the old official castle for good and began the construction of Schloss Barby as his new residence. The master builders were Christoph Pitzler and from 1707 Giovanni Simonetti, who orientated himself from plans drawn up by Johann Arnold Nering. The building could only be finished in 1715; in the meanwhile, Heinrich and his wife spend long periods of time in Dessau with his father-in-law John George II, Prince of Anhalt-Dessau, and his brother-in-law Leopold I, Prince of Anhalt-Dessau. Great importance was attached to his defection from Lutheranism to Calvinism in Dessau on 1688. In Barby, members of the Reformed Church established themselves there until 1833. Heinrich was also accepted into the Fruitbearing Society by his father, who served as its head. Heinrich died in Barby at age seventy and was buried there in the new family vault. His only surviving son, Georg Albrecht, succeeded him. Marriage and issue In Dessau on 30 March 1686 Heinrich married Elisabeth Albertine of Anhalt-Dessau, daughter of John George II, Prince of Anhalt-Dessau, and former Abbess of Herford. Elisabeth's paternal great-great grandmother was Agnes of Barby-Mühlingen; this give to Heinrich some blood ties to the extinct House of Barby. They had eight children: Johann August, Hereditary Prince of Saxe-Weissenfels-Barby (b. Dessau, 28 July 1687 - d. Dessau, 22 January 1688). Johann August, Hereditary Prince of Saxe-Weissenfels-Barby (b. Dessau, 24 July 1689 - d. Dessau, 21 October 1689). Stillborn twin sons (Dessau, 1690). Frederick Heinrich, Hereditary Prince of Saxe-Weissenfels-Barby (b. Dessau, 2 July 1692 - d. The Hague, 21 November 1711). Georg Albrecht of Saxe-Weissenfels, Count of Barby (b. Dessau, 19 April 1695 - d. Barby, 12 June 1739). Henriette Marie (b. Dessau, 1 March 1697 - d. Weissenfels, 10 August 1719). Stillborn daughter (Dessau, 5 October 1706). 1657 births 1728 deaths House of Saxe-Weissenfels People from Halle (Saale) Albertine branch Recipients of the Order of the White Eagle (Poland)