Peter Munday, an English visitor to Amsterdam in 1640, wrote:
As for the art of painting and the affection of the people to pictures, I think that none go beyond them. All strive to adorn their houses, especially the outer or street rooms, with costly pieces --butchers and bakers not much inferior in their shops, which are fairly set forth, yea many times blacksmiths, cobblers, etc. will have some picture or other in their forge and in their stalls. Such is the general notion, inclination, and delight that these country natives have to painting.
Web Gallery of Art has entries for: Frans Hals, Jacob van Ruisdael, Jan Vermeer ,Wilhelm Kalf, and others.
I have developed a page with links to important sites focusing on the art of Jan Vermeer.