2021 Castillo de San Marcos $7.95 Postage Stamps - Priority Mail, Sheet

$36.00

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5 Sheets of (20 Pcs) 25 Sheets of (100 Pcs) 50 Sheets of (200 Pcs)

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Pictures a digital illustration of Castillo de San Marcos based on a modern photograph. Original art by Dan Cosgrove.

The Castillo de San Marcos (St. Mark’s Castle) is the continental United States’ oldest masonry fort. It was designed by Spanish engineer Ignacio Daza and built on the western side of Matanzas Bay in St. Augustine, Florida.

The Castillo de San Marcos was originally a Spanish fort, but came under British control in 1763. It was returned to Spain in 1783 before it was ceded to the United States in 1821 under the Adams-Onís Treaty. At that time, the US renamed the structure Fort Marion and turned it into an army base. The fort was declared a national monument in 1924. After over 250 years of military service, the site was deactivated in 1933. In 1942, it was officially renamed Castillo de San Marcos.