All corrections
Wikipedia May 25, 2026 at 05:39 AM

en.wikipedia.org/wiki/Presidio_of_San_Francisco

5 corrections found

1
Claim
It passed to Mexico in 1820
Correction

The Presidio did not pass to Mexico in 1820. The National Park Service dates the Mexican period to 1822–1846 and says the revolution that created Mexico culminated in 1821.

Full reasoning

This date is off by at least a year.

The National Park Service's history page for the Presidio labels the "Mexican Period: 1822-1846" and explains that the conflict in New Spain "climaxed in 1821, when revolution led to formation of the Mexican Republic." It also says that after that revolution, Presidio soldiers switched allegiance to Mexico. So the Presidio was not under Mexican control in 1820.

This is also consistent with the article's own later timeline entry stating "1821: Mexico became independent of Spain."

1 source
2
Claim
The building was used by the Coast Guard from 1890 to 1990.
Correction

The site was not the Coast Guard for that entire period. NPS says it began in 1890 as a U.S. Life-Saving Station, and the Coast Guard—its successor—left in 1990.

Full reasoning

This overstates the Coast Guard's role by treating the whole 1890-1990 period as Coast Guard use.

According to the National Park Service, the site was "Activated in 1890" as a "U.S. Life-Saving Station." The same NPS page says that "In 1990, the U.S. Coast Guard, the successor of the U.S. Life-Saving Service, moved its operations" away from the site.

So the building was associated with lifesaving services beginning in 1890, but it was not the Coast Guard for that entire century-long span. The Coast Guard is described by NPS as the successor to the earlier Life-Saving Service, not the agency operating there since 1890.

1 source
3
Claim
open on Friday, Saturday, and Sunday
Correction

That schedule is outdated. As of May 25, 2026, the official National Park Service hours say Fort Point is open Thursday through Monday, not just Friday through Sunday.

Full reasoning

This is current visitor-hours information, and the official National Park Service page now lists a different schedule.

NPS's Operating Hours & Seasons page for Fort Point says: "Open Thursday through Monday, 10:00am-5:00pm." That means Fort Point is currently open five days a week, including Thursday and Monday, not only Friday, Saturday, and Sunday.

Because the Wikipedia sentence is written in the present tense as current visitor information, the official current NPS schedule contradicts it.

1 source
4
Claim
instead donated the art to the San Francisco Museum of Modern Art before he died in 2009.
Correction

SFMOMA says the Fisher Collection was placed on long-term loan, not donated. The museum describes a 2009 partnership with the Fisher family rather than a transfer of ownership.

Full reasoning

The problem here is the word "donated." SFMOMA's own description says the Fisher Collection was not given outright to the museum.

In its official 2026 press material, SFMOMA states that "In 2009, SFMOMA entered a groundbreaking partnership with the Fisher family to place more than 720 works by 100 artists from the Fisher Collection on long-term loan to the museum." It further says the loan was initially conceived for 25 years and later extended to 100 years.

A long-term loan is not the same thing as a donation: ownership remains with the lender/family or associated foundation rather than transferring permanently to the museum. So this sentence misstates what happened to the collection.

1 source
5
Claim
Gulf of the Farallones National Marine Sanctuary
Correction

That sanctuary name is outdated. NOAA officially changed it in 2015 from Gulf of the Farallones National Marine Sanctuary to Greater Farallones National Marine Sanctuary.

Full reasoning

NOAA no longer uses "Gulf of the Farallones National Marine Sanctuary" as the sanctuary's official name.

In NOAA's official notice about the sanctuary expansion, the agency states that effective June 15, 2015, it "changed the name of Gulf of the Farallones National Marine Sanctuary to 'Greater Farallones National Marine Sanctuary'".

So referring to the visitor center by the old sanctuary name is factually outdated and does not reflect the sanctuary's official name.

1 source
Model: OPENAI_GPT_5 Prompt: v1.16.0