On what exact date was the Sistine Chapel ceiling unveiled?

The Sistine Chapel ceiling was unveiled on November 1, 1512.

Michelangelo completed the second half of the vault by the end of October 1512. Pope Julius II celebrated Mass in the chapel on November 1, the Feast of All Saints, when the finished decoration was formally inaugurated and shown to visitors.

Some accounts mention October 31 because the frescoes were completed and revealed on All Hallows’ Eve. That date marks the finishing or initial uncovering of the work, while November 1 marks the public religious inauguration associated with the completed ceiling. For a trivia question asking when it was unveiled, November 1 is the standard answer.

The event came after roughly four years of demanding work above the chapel floor. Michelangelo painted scenes from Genesis, including The Creation of Adam, alongside prophets, sibyls, and other figures. The completed scheme contained more than 300 figures and immediately enhanced his reputation across Europe.

This unveiling should not be confused with the later restoration’s reopening in 1994, which revealed brighter colors after centuries of grime and candle smoke had darkened the frescoes.