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Tiles uncovered from 19th century Sutro Heights Conservatory Greenhouse


The Sutro Conservatory Greenhouse building above the Cliff House, 1886

Last Friday, a group of students from Ida B. Wells Continuation High School completed a 3-day archaeological dig that uncovered a portion of the original floor from Adolph Sutro’s Conservatory Greenhouse building [full story on sfgate.com].

The Conservatory building was torn down in 1939, along with Sutro’s family home, after they fell into disrepair. A little history about the building, courtesy of the National Park Service:

The conservatory was an elaborate greenhouse structure built to house Sutro’s collection of climate-sensitive tropical plants. Centrally located on an elevated mound east of the terminus of Palm Avenue, the structure was cruciform in plan, with a central ventilation tower. Built entirely of small glass panels mounted in wood frames, this ornate garden structure was supported by internal wood framing. The interior, which held a lush variety of palms, ferns, tropical flowers, and statuary, provided visitors with an impressive botanical display.

After last week’s excavation, the students found that the blue and white tiles that made up the Conservatory floor were still in pretty good condition, though some were cracked or upended by tree roots.

The activity was a service learning project for the students, and ended with a debate about what to do with the patch of land now that the tiles had been uncovered. Should they remain exposed to the elements so everyone could see them? Or covered back up to preserve them? The students settled on leaving about 30% of the tiled area uncovered.

Thanks to the Ida B. Wells students for bringing back a piece of Sutro Heights’ history! Makes you wonder what else is buried just under the surface of Sutro Heights Park…

Sarah B.


The uncovered tiles from the Sutro Conservatory Greenhouse building. Photo by Beck Diefenbach, The Chronicle


Students clear the ground over the tiles. Photo by Beck Diefenbach, The Chronicle


A close-up of the tiles. Photo by Beck Diefenbach, The Chronicle

9 Comments

  1. I don’t know where they should go, maybe donated somewhere (a historical society? – sorry, I’m not helpful at all). But just leaving them there invites thieves.

  2. What a great experience for these students! I hope they all feel very proud of themselves. I’m really impressed that Ida B. Wells Continuation H.S. is giving kids this kind of opportunity.

  3. Cool discovery. Thanks for letting us know.

    Apparently the Sutro mansion and outbuildings were torn down in the late 1930s — they still appear on the 1936 aerial photos you highlighted many posts ago (viewable at http://www.davidrumsey.com; search for “San Francisco 1936”). I had always envisioned the mansion sitting smack in the center of the raised “parapet” area, but in truth it was off to the south (where the little stone stairs look like they might be coming down from someone’s kitchen garden). (Sutro had the parapet built some years after the house, specifically for public strolling; I’m too lazy to look up the dates but there’s good info in the visitor center and signage).

  4. Cool discovery. Thanks for letting us know.

    Apparently the Sutro mansion and outbuildings were torn down in the LATE 1930s as they still appear on the 1936 aerial photos you highlighted many posts ago (viewable at http://www.davidrumsey.com; search for “San Francisco 1936”). I had always envisioned the mansion sitting smack in the center of the raised “parapet” area, but in truth it was off to the south (where the little stone stairs look like they might be coming down from someone’s kitchen garden). (Sutro had the parapet built some years after the house, specifically for public strolling; I’m too lazy to look up the dates but there’s good info in the visitor center and signage).

  5. They might be a good addition to the Land’s End visitor center, especially under lock and key.

  6. Lock and key is good. I’m almost ashamed to admit that I had a piece of one of these tiles for years before I lost it on my travels. Of course I found it back in the 70s, long before any restoration effort for the Park was thought of.

  7. That is awesome. Their next mission should be to find the elusive statuary of Sutro Park.

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