The Rijksmuseum in Amsterdam, the national museum of the Netherlands, has a terrific web site. It is such a cool site! Browse it up. You can learn a lot. Amazingly detailed information. Pick a number, any of the numbers, to reveal a factoid.
“In the late 15th and early 16th centuries — when travel was difficult, dangerous and often doomed to failure — the German Renaissance artist Albrecht Dürer took the common European practice of journeying as a way of experiencing the world and improving his craft.”