Some sixteenth-century people loved travelling, such as the Antwerp merchant Jan Ympyn Christoffels (around 1485-1540). He lived in Venice for twelve years and learned to do accounting in the Italian way. This ‘double-entry accounting’ with all entries being made to a ‘logbook’ and a ‘ledger’, is still in use today. Back in Antwerp, he wrote down his knowledge. The book was published three years after he died and played an important role in the development of accounting and a healthy trading environment.