(1) In 1448, soon after his return to Mainz, Gutenberg borrowed 150 gulden from Johannes Fust - at that time a sum equivalent to five years' income of an average peasant.

(2) The island's unit of currency is the Aruban guilder or gulden .

(3) This appointment, which involved teaching arithmetic and geometry, gave Rheticus a salary of 100 gulden .

(4) Although these conditions seem strict by today's standards, they were typical of the time and earned the composer some 600 gulden a year with other benefits.

(5) The Austrian national debt in gulden rose from 372m. in 1790 to 658m. in 1800 and 1,011m. in 1821.

(6) Spain's contribution to her Habsburg's cousin was a mere 1.9 million gulden while the pope, who saw the Emperor as the defender of Catholicism, provided just 900,000 gulden .

(7) One of the reasons is that there were three different currencies in use in Germany during the war - the thaler, the mark and the gulden .