PORTLAND — The U.S. Postal Service is unveiling a new postage stamp in Portland featuring a painting by artist Winslow Homer, who produced some of his memorable work while living in Maine.

The Portland postmaster and his staff are unveiling the stamp today at the Portland Museum of Art, where an exhibit of 28 of Homer’s watercolors and oil on canvas are now on display.

The stamp features Homer’s “Boys in a Pasture,” an 1874 painting that shows two boys sitting at peace in a field.

Homer produced some of his best-known works while living in a studio in Scarborough, outside of Portland, from 1883 until his death in 1910.