The Transcontinental Railroad linking up the East and West halves of the US was completed in Colorado.
Source
Spanish conquistador Pedro Arias Dávila founded Panama City.
Bahrain declared independence from Britain.
The Sistine Chapel in the Vatican opened for its first mass.
Mainz Psalter was published, making it the first book with a printed publication date on it.
An all-steel church called San Sebastian Church opened in Manila, Philippines.