In Eckersberg's Cloisters

In Eckersberg’s Cloisters, San Lorenzo fuori le mura

The arches move, the light moves.
Three brothers stroll away. A fourth
brings a bushel of fruit from the gardens.
And against a pillar, stairs rising north
from his head, another brother attends
to a text--the arced afternoon light fails
to reach him, no matter how I stand, tilt
my head, cover one eye with this book.
Only a slender lizard lies still and warms
its blood with the sun; the walls, meanwhile,
grow green at the edges, stucco peeled from brick
like skin around a fresh and gradual wound.

First appeared in Ekphrasis

Here's the first draft, from a long time back.