Christmas issue: Raphael "The Small Cowper Madonna", National Gallery of Art (Washington, D.C.) 8-cent 1973 issue U.S. stamp.
<bdi><a href="https://en.wikipedia.org/wiki/en:Raphael" class="extiw" title="w:en:Raphael"><span title="Italian painter and architect (1483–1520)">Raphael</span></a>
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U.S. Postal Service; National Postal Museum: <a rel="nofollow" class="external text" href="http://arago.si.edu/category_2034501.html">1973 Christmas Issue</a>