Icon with six scenes from the Passion, Byzantine, Third quarter of 14th century.  Thessaloniki, Vlatadon Monastery, sacristy.  The Cloisters, New York.

The Peaceable Kingdom, Edward Hicks, 18th cent. American.

Triumphal arch of St. Maria Maggiore, Rome, 432 A.D., mosaic detail.

Gustave Dore, The New Jerusalem, 1865, from the Dore Bible.  Found at http://clawww.lmu.edu/faculty/fjust/Dore-Rev.htm

I blame Dante for that silly idea about Heaven being a place where you float on clouds, rather than a city.

This is a cat on a turntable.