Duchy of Friedland was a de facto sovereign duchy in Bohemia. It was created in 1627 and disappeared in 1634, after death of the ruler, Albrecht von Wallenstein. It was preceded by the Principality of Friedland existing in the years 1624 to 1627. Establishment of the principality, and then the duchy, followed the rise to power of Albrecht von Wallenstein, a military leader in the service of the House of Habsburg during the Thirty Years' War. In August 1622 Wallenstein was granted titles of Count Palatine and Imperial Count. A predicate "of Friedland" was granted after northern Bohemian town Frýdlant acquired by Wallenstein in 1621, together with the whole Friedland dominion. On September 7, 1623 he was given title of Imperial Duke. At this time he owned 49 dominions in eastern and northern part of Bohemia, in year 1624 the number grew up to 64 and on March 12, 1624 Emperor Ferdinand II declared the area as Principality of Friedland. Because of ducal title the Principality was elevated to Duchy on January 4, 1627. The new duchy was de facto independent from the rest of Bohemia. Wallenstein had started an ambitious reconstruction of Jičín, capital of the duchy. He planned to set up bishopric, university and a diet. In 1628 he obtained the right to mint its own coins and the rights to grant nobility titles and township privileges. Preparation for the new university included invitation of Jesuits to Jičín where they established a Jesuit college. Wallenstein initiated building of a large early-Baroque church as a seat of the bishop. Next to the church the ducal palace was built. Area of the town had doubled during this period. Near to Jičín a large park was established - remains of whose survived until now. Throughout the duchy Wallenstein's financier Hans de Witte set up and controlled silver, copper and lead mines, iron forges, armament factories and river Labetransportation system, all geared up to supply warlord's forces. After Wallenstein's death most of the duchy was given to CountMatthias Gallas and its independent status was annulled.
Anton Ernstberger: Wallenstein als Volkswirt im Herzogtum Friedland, Reichenberg i.B. Kraus. 1929. VI, 148 S. : Kt.. Prager Studien aus dem Gebiete der Geschichtswissenschaft ; 19.