The Sistine Chapel is well known as an artistic masterpiece, the ceiling of which was painted by Renaissance master artist Michelangelo between 1508 and 1512. Extensive information is here.
Located in Rome, Italy (more specifically Vatican City), I was lucky enough to crane my neck at this in person when my wife and I toured Italy on our honeymoon. Now you can see it virtually, through the efforts of Villanova Univerity (at the behest of the Vatican), here.
Really worth scrolling around.
More info on the making of the virtual tour, here.