This electronic art gallery is dedicated to the works of Johannes Vermeer, bringing together all the known paintings of this 17th-century Dutch Old Master.
As well as reproducing all the paintings, the Web site has a detailed description of each of the works, explaining what his serene portraits and closely-observed domestic scenes were attempting and the symbolism represented in the subject matter. These mini-essays include cross-references to other works by Vermeer, and if you click on the names of paintingsmentioned in the text, you can link to the other pictures under discussion.
Viewing a painting on screen is no substitute for seeing the actual canvas. So the Web site also includes a feature called "find your closest Vermeer", which gives you a map showing where the paintings are on display. In London, the Web site tells me, there are Vermeers in the National Gallery and the State Rooms of Buckingham Palace.