The Turkish captives taken to Germany were not solely made up of men. For example, General Schöning took "two of the most beautiful women in the world" in Buda who later converted to Christianity. Another Turkish captive named Fatima became the mistress of Augustus II the Strong, Elector of Saxony of the Albertine line of the House of Wettin. Fatima and Augustus had two children: their son, Frederick Augustus Rutowsky, became the commander of the Saxon army in 1754-63 whilst their daughter, Maria Anna Katharina Rutowska, married into Polish nobility. Records show that at this point it was not uncommon for Turks in Germany to convert to Christianity. For example, records show that 28 Turks converted to Christianity and were settled in Württemberg. With the establishment of the Kingdom of Prussia in 1701, Turkish people continued to enter the German lands as soldiers employed by the Prussian kings. Historical records show that this was particularly evident with the expansion of Prussia in the mid-18th century. For example, in 1731, the Duke of Kurland presented twenty Turkish guardsmen to King Frederick William I, and at one time, about 1,000 Muslim soldiers are said to have served in the Prussian cavalry. The Prussian king's fascination with the Enlightenment was reflected in their consideration for the religious concerns of their Muslim troops. By 1740 Frederick the Great stated that: By 1763, an Ottoman legation existed at the Prussian court in Berlin. Its third envoy, Ali Aziz Efendi, died in 1798 which led to the establishment of the first Muslim cemetery in Germany. However, several decades later, there was a need for another cemetery, as well as a mosque, and the Ottoman sultan Abdulaziz was given permission to patronize a mosque in Berlin in 1866. Once trading treaties were established between the Ottomans and the Prussians in the nineteenth century, Turks and Germans were encouraged to cross over to each other's lands for trade. Consequently, the Turkish community in Germany, and particularly in Berlin, grew significantly (as did a German community in Istanbul) in the years before the First World War. These contacts influenced the building of various Turkish-style structures in Germany, such as the Yenidze cigarette factory in Dresden and the Dampfmaschinenhaus für Sanssouci pumping-station in Potsdam. During this time, there were also marriages between Germans and Turks. For example, Karl Boy-Ed, who was the naval attaché to the German embassy in Washington