In 1722, a small group of the Bohemian Brethren (the "Hidden Seed") who had been living in northern Moravia as an illegal underground remnant surviving in the Catholic setting of the Habsburg Empire for nearly 100 years, arrived at the Berthelsdorf estate of Nikolaus Ludwig von Zinzendorf, a nobleman who had been brought up in the traditions of Lutheran Pietism. Out of a personal commitment to helping the poor and needy, he agreed to a request from their leader (Christian David, an itinerant carpenter) that they be allowed to settle on his lands in Upper Lusatia, which is in present-day Saxony in the eastern part of modern-day Germany. The Margraviates of Upper and Lower Lusatia were governed in personal union by the Saxon rulers and enjoyed great autonomy, especially in religious questions.