Johann’s father was A. S. Freystein, vice-chancellor of Duke August of Saxony, and inspector of the Gymnasium at Weißenfels. At the University of Leipzig, Johann studied law, mathematics, philosophy and architecture.
Johann Burchard Freystein lived for some time in Berlin and Halle, then went to Dresden as a lawyer’s assistant. After graduating LL.D. at Jena in 1695, he started his own practice in Dresden. In 1703, he became Rath at Gotha, but returned to Dresden in 1709 as Hof- und Justizrath. In 1713, appointed a member of the Board of Works.