Ivan Eugen Padovec (17 July 1800 – 4 November 1873), commonly known as Johann (Ivan) Padowetz (see the signature on the photo), born in the baroque town of Varaždin in Croatia (known for its festivals of baroque music), was a guitar virtuoso, who gave concerts in Zagreb, Vienna, Prague, Budapest, Hamburg, London, etc. He constructed a ten-string guitar. Also, his Theoretisch-praktische Guitarrschule was published by Werner & Comp. in Vienna around 1844. Source : Wikipedia