Edward Hicks, The Peaceable Kingdom, about 1833. I like the simplicity and purity of the painting. It's symbolism is obvious when one looks at the background--where William Penn is making a treaty with the Indians.
Bach's Mass in B Minor is one of the masterpieces of Baroque music. This was the first recording I bought and the one I keep coming back to still, John Eliot Gardiner, Moneverdi Choir and Enlgish Baroque Soloists. Stunning.