The Bach Motif

Bach's name forms a musical motif. The German note B is equivalent to the English B-flat, and H indicates B natural. So if you revolve this cross counterclockwise, the note at the center takes successively the German values B (treble clef), A (tenor clef), C (alto clef), and H (treble clef).
Bach himself used the four-note motif as a subject in The Art of Fugue, and it's appeared since in works by Schumann, Liszt, Rimsky-Korsakov, Poulenc, and Webern.
Scherzando

In 1991 Harvard's music library discovered a lost canon of Mozart, the composer who Leonard Bernstein said offers "the spirit of compassion, of universal love, even of suffering — a spirit that knows no age, that belongs to all ages."
It's called "Lick Me in the Ass."
John Carter

Paralyzed in a fall in 1836, John Carter discovered a talent for art, holding a brush in his teeth and working in bed. The figures below are after Albrecht Dürer.

See also No Handicap, Sarah Biffen, and Prince Randian.
Trivium

The Mona Lisa has no eyebrows.
"The Tomb and Shade of Washington"

See also The General's Ghost.
A Risky Compliment

In Vertumnus, Giuseppe Arcimboldo portrayed his patron Rudolf II as the Roman god of growth and change. Fortunately, Rudolf appreciated the metaphor and awarded Arcimboldo one of his highest orders.
See also Renaissance Surrealism and The Librarian.
Encore!

Reportedly the world's shortest play is The Exile, by Tristan Bernard.
The curtain rises on a mountaineer in a remote cabin. An exile knocks on the door.
EXILE: Whoever you are, have pity on a hunted man. There is a price on my head.
MOUNTAINEER: How much?
The curtain falls.
Topsy-Turvy

The great thing about Gustave Verbeek's comic strips is that when you reach the end of a page, you can invert it to see the story continue.
He created 64 such comics for the New York Herald between 1903 and 1905.

Lie Down

The Isle of Dogs. An 18th-century engraving.
Menagerie

This 1872 Currier and Ives print is titled The Puzzled Fox: Find the Horse, Lamb, Wild Boar, Men's and Women's Faces. There are eight human and animal faces hidden in the scene. Can you find them?
Ironically, the birds in the upper left have now disappeared — they're passenger pigeons.
