October 2: Castillo de San Marcos

On this date in 1672, construction began on the Castillo de San Marcos, the oldest masonry fort in the continental United States. Construction of the fort took 22 years.

Castillo de San Marcos

Use this banner on social media to share our collection of Castillo de San Marcos teaching resources.

San Marcos iBook

The Castillo de San Marcos National Monument iBook provides a comprehensive history of the fort from 1668 until its transfer to the United States in 1821. Created by FCIT for the NPS as a part of the Hispanic Heritage iBook series. 158 pages + 106 glossary terms, 98 MB download

St. Augustine

A two-page PDF about St. Augustine from the “Florida Then and Now” series on the Exploring Florida website.

Gallery of San Marcos Photos

Nearly 400 photos of the Castillo de San Marcos from the ClipPix ETC website.

San Marcos Photo Galleries

Two smaller galleries of Castillo de San Marcos photos from the Exploring Florida website.

San Marcos in 3D Stereoviews

Two galleries of Castillo de San Marcos stereoviews. Red/blue 3D glasses required.
Gallery 1 | Gallery 2

Florida Maps Collection

A large collection of Florida maps from the Spanish period, arranged in galleries by date. Available on the Exploring Florida Maps website.