In what year did the line from which Premyslaw II come from become extinct?
Przemysław II, Duke of Cieszyn:  von Teschen ; 1422/25 – 18 March 1477), was a Duke of Cieszyn (Teschen, Těšín) from 1431, ruler over Bielsko and Skoczów (from 1442), Duke of half of both Duchy of Głogów (Glogau, Hlohov) and Duchy of Ścinawa from 1460 and from 1468 sole ruler over Cieszyn. Duchy of Teschen:  It was split off the Silesian Duchy of Opole and Racibórz in 1281 during the feudal division of Poland and was ruled by Silesian dukes of the Piast dynasty from 1290 until the line became extinct with the death of Duchess Elizabeth Lucretia in 1653.
1653