Privy Councillor Simon Heinrich Sack Family Foundation

After his studies in Law in Halle and Frankfurt/Oder at the age of 27, he became Court and Justice Councillor in Glogau and Privy Councilor (Hofrat) to Frederick the Great.

He did apparently have an illegitimate child with his housekeeper Anna Maria Biesler (1735–1799) (although the identity of the actual mother is still a matter of dispute and no exact records have been found).

Since 1945 its official seat is in Bückeburg[6] Despite the loss of the majority of its assets, the foundation still exists today and is administered by the descendants of the founder.

It regularly publishes the so-called 'Silberne Buch der Familie Sack' (Silver Book) which records the history of the foundation and the family genealogy with the records of some 17,500 descendants[7] The foundation is particularly important because, due to the vast amount of wealth involved, it attracted the interest of the King of Prussia who wanted to appropriate its funds for the war effort against Napoleon.

The most famous artifact is the painting by Johann Heinrich Wilhelm Tischbein: Louise of Mecklenburg-Strelitz (1776–1810), since 1793 wife of Frederick William III of Prussia.