The Prague Astronomical Clock

The 600 Years from the macula on Vimeo.

Photo: Andrebnu on Flickr

The Prague Astronomical Clock, built 602 years ago into the walls of the old Town Hall, expanded and rebuilt multiple times, tracks the sun, moon, zodiac, standard time, the twelve hour variable day, the calendar, and other variables, and features moving figues of the twelve apostles, cardinal virtues and vices, and animals.

For its 600th anniversary, the city of Prague put on this display.

(via The Long Now Foundation)