This relic of the medieval period was first built in the 15th century, making it the third-oldest astronomical clock and the oldest clock still operating in the entire world. This intricate clock not only tells time but also astronomical information including relative positions of the sun, moon, constellations and sometimes even major planets! People gather in front of the Old Town Hall Tower, where the clock sits, each hour to watch it chime, an experience that lasts about 45 seconds.

This week’s #g1photofriday was uploaded by user @coachkallen using the hashtag #gate1travel. This picture was taken in Prague, Czech Republic. Be sure to tag your photos on social media with #gate1travel or #g1photofriday to be featured. Check out Gate 1 Travel’s Czech Republic and Central Europe trips here!