The foundation of the original Spanish fort was gradually covered over and forgotten as the U.S. Army expanded the Presidio. In 1993 as the Army was preparing to permanently leave the Presidio, workers made a startling discovery.

A substantial set of stone foundations was unearthed beneath the Funston Avenue Officers’ Quarters. The U.S. Army had not built anything prior to the Funston Quarters, yet, undoubtedly, a very old structure once stood in that location.

As archaeologists began to follow the extent of these foundations, they discovered that they continued west to Pershing Square and south to the Officers’ Club. An expansive fortified structure measuring approximately 500 feet along one edge was revealed. The foundation of the original el Presidio de San Francisco had been re-discovered.

Current Research

Archaeological research at this site has continued under the leadership of the Army, the National Park Service, and now the Presidio Trust. Each successive phase of fieldwork adds complexity to the story. Research on el Presidio continues, especially at the Officers’ Club and former chapel.