Photo personnelle (J.Capez)du Fort de Couppes à <a href="https://en.wikipedia.org/wiki/fr:Le_Portel" class="extiw" title="w:fr:Le Portel">le Portel</a> Plage- Fort datant années 1870. (Ouvrages <a href="https://en.wikipedia.org/wiki/fr:Syst%C3%A8me_S%C3%A9r%C3%A9_de_Rivi%C3%A8res" class="extiw" title="w:fr:Système Séré de Rivières">Séré de Rivières</a>)
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CC BY 2.5
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