A Glaring of Cats Making Music and Singing1700 by Unknown

Flemish School.

"There are two means of refuge from the miseries of life: music and cats." - Albert Schweitzer

See also very similar paintings, one attributed to Ferdinand Van Kessel, called Cat's Concert, c. 1696 (http://curiator.com/art/ferninand-van-kessel/cats-concert)
and A Concert of of Cats, Owls, a Magpie, and a Monkey in a Barn by Cornelis Saftleven (http://curiator.com/art/cornelis-saftleven/0)
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Source: picssr.com
Media: oil on panel