Ivan Eugen Padovec , 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.