The three Charites (Roman: Graces), daughters of Zeus and Eurynome, are goddesses of charm, beauty, creativity and fertility. Their names are: Aglaea (Beuty), Euphrosyne (Mirth) and Thalia (Good Cheer). They were responsible for the god meals and created a good atmosphere in celebrations. Usually, they were constant companions of Aphrodite (Venus), goddess of beauty and love.
Here are five stamps show the Three Graces in different paintings:
The Three Graces on 1st century fresco from Pompeii – Guinea Equatorial:
The Three Graces, by Hans von Aachen (1552-1615) – Romania, 1969:
The Three Graces" by Peter Paul Rubens (1577-1640) – Upper Volta, 1977:
The three Graces, painting by Raphael (1483–1520), issued by Bulgaria on December 28, 1984:
The three Graces, by Battista Naldini (1535–1591), issued by Hungary on December 10, 1968:
Of course, the most famous painting of the Three Graces is the La Primavera by Botticelli mentioned by jleb1979
in page 3 of this thread with two examples. I will bring more from Botticelli other time.