František Ladislav Čelakovský was Czech folklorist and poet. A disciple of Herder and a romantic Pan-Slavist, he collected Slavic folk songs from 1822 to 1827. These he later imitated in his own intricate free verses, Echoes of Russian Song (1829) and Echoes of Czech Song (1830). At Breslau he became (1841) the first professor of Slavic languages in a Central European university.