Art on Stamps
Non-commercial, multilingual, awarded site. Offers free huge database, free club membership, new issues information, extensive art gallery.

Czech and Slovak Art on Stamps
The most extensive site on the works of Czech and Slovak artists, as shown on postal stamps.

Stamps: Austria and Hundertwasser
Austria and Hundertwasser.

Literature on Stamps
The world literature and its authors on postage stamps.

Hundertwasser Art On Postage Stamps
The beautiful art of Hundertwasser on stamps from around the world.

Hundertwasser Stamp Resource
Comprehensive information on all aspects of collecting stamps and philatelic items concerning the Austrian artist Friedensreich Hundertwasser.

Art History on Stamps
Art styles through times, illustrated through stamps and philatelic material.

Czeslaw Slania's Engraved Stamps and Banknotes
The Swedish master engraver's life and work, shown on postage stamps, banknotes, revenues, and cinderellas.