• Cannon firing on the gundeck of the Castillo de San Marcos

    Castillo De San Marcos

    National Monument Florida

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  • Summer Weather

    Afternoon Thunderstorms can create dangerous amounts of lightning strikes. If Lightning is visible from the Castillo, Gundeck closures will take place. Click this link for the local weather forcast. More »

Commercial Use Authorizations

In compliance with federal law, the Castillo de San Marcos and Fort Matanzas National Monuments have instituted a commercial use authorization program.

All businesses who wholly or partly provide commercial services at the parks must obtain a commercial use authorization.

For additional information you may e-mail us.

Cover letter

Application

Instruction Guide

Did You Know?

Castillo casemate, or room, which was primarily used for storage.

The Castillo de San Marcos is built with the unique limestone, "coquina". Made of many tiny shell fragments and sand lightly bound together with calcite, it has survived cannon balls and hurricanes but is very fragile to human contact. Castillo de San Marcos National Monument, Florida