The world’s second oldest theme park, Tivoli Gardens, opened in Copenhagen, Denmark.
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Spanish conquistador Pedro Arias Dávila founded Panama City.
Ohio State University's Big Ear radio telescope detected a deep-space radio signal.
An all-steel church called San Sebastian Church opened in Manila, Philippines.
Mainz Psalter was published, making it the first book with a printed publication date on it.
The Transcontinental Railroad linking up the East and West halves of the US was completed in Colorado.
