Related video above: Transamerica Pyramid is unveiled after renovations

(NEXSTAR) – For 50 years, a metal propane-tank shaped contraption was buried, forgotten, under San Francisco's Transamerica Pyramid. But when the iconic building changed hands, its new owners unearthed the buried tank, discovering pieces of San Francisco history inside.

The time capsule was first buried in 1974, shortly after construction on the building was completed. Its location was marked by a brass plaque, which instructed people not to touch it for 50 years.

But over the years, as changes and renovations were made to the building, that plaque was removed, according to SHVO, the real estate firm that bought the building in 2020.

After SHVO acquired the Pyramid, they launched into a multi-year renovation. Last

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