[3] In 1488 he becomes a citizen of Basel, two weeks later he enters the Guild to Saffron [de] which permitted him to open his own workshop in the Ackermanshof in St.Johanns Vorstadt.
[5] The edition of 1978 pages and three volumes counted with an index and is the only recorded work for which Johannes Petri is mentioned as the sole printer.
[5] An other accomplishment was the printing of the collected works of Augustine, which was a major project for which the three Hannsen joined forces for three years.
[7] From 1509, the first printers-mark of Johannes Petri depicting a Basilisk holding the coats of Arms from Basel is known.
[9] His wife Barbara would die shortly after and their three children and the printing workshop would later be entrusted to Johannes Froben.