Boy looks at a Christmas tree, unknown, c. 1920s - Square Greeting Card

Christmas Card by Karl Hugo Frech, c.1930 - Square Christmas Card

Hope II by Gustav Klimt, 1907-8 - Square Greeting Card

Christmas Card by Lucien Pissarro, 1925 - Square Greetings Card

Madonna and Child, with Crucifix by Eric Gill, 1917 - Greetings Card

Madonna and Child with Madonna kneeling by Eric Gill, 1914 - Square Greetings Card

Now Will You Believe Me by J. Ottman Lithographic Company, 1910 - Square Greetings Card

Christmas Shopping by Edward Penfield, c.1910 - Greetings Card

Lady and Her Horse on a Snowy Day in 1899 by Felix Thiollier - Square Greetings Card

Two Intertwined Female Figures by Mileva Roller, c. 1908-1915 - Square Greetings Card

Hunters in the Snow by Franz Sedlacek, 1930 - Square Greeting Card

Landscape with Sea Fog by Franz Sedlacek, 1921 - Square Greeting

Private Box in the Sophiensaal, Vienna by Josef Engelhart, 1903 - Square Greetings Card

At the Theatre by Prudence Heward, 1928 - Square Greeting Card

Robin, Erithacus rubecula by Anselmus Boetius de Boodt, 1596-1610 - Square Greetings Card

The Legend of the Cradle by Napoleon Bourassa, c.1881 - Square Greetings Card

Two Women on the Shore by Edvard Munch, 1898 - Square Greeting Card

Three Women by Johannes Frederik Engelbert ten Klooster, 1921 - Square Greeting Card

Sussex Church by Eric Ravilious c.1931 - Square Greeting Card

Beech Grove by Gustav Klimt, 1902 - Square Greeting Card

Two Dancers by Christian Rohlfs, 1921 - Square Greeting Card

Frida Kahlo holding the leaf of an Agave plant by Toni Frissell, 1937 - Square Greeting Card

Zakariya al-Qazwini's Marvels of Things Created and Miraculous Aspects of Things Existing, 13th Century - Square Greeting Card