jacob attended the school until 1630, probably learned latin and spoke italian. he was sent to innsbruck to learn the art of organ building with daniel hertz, but not being inclined to the work was directed towards the construction of violins. in this field a good knowledge of technical, artistic, drawing, carving and materials is needed. he then completed an apprenticeship in joinery with a relative, hanns grafinger. in 1630 to 1643, he went to cremona as journeyman to complete his training as a luthier, possibly with nicolò amati. although his name does not appear on the lists of amati's apprentices, a violin made 1645 has been cited with an original label at the top block stating: "jacob stainer/ fecit cremona 16.."; perhaps he also went to venice to work for a short period with vermercati.