Due to unforeseen circumstances, Watercolor Wednesday is Watercolor Thursday this week.
Prague’s Astronomical Clock (Pražský orloj) dates back to 1410 and is the oldest still-functioning astronomical clock in the world. It is a major tourist attraction in Prague’s Old Town Square, particularly on the hour when animated figures surrounding the clock are set in motion, referred to as “The Walk of the Apostles.”
In 2010, Prague celebrated the 600th anniversary of the Astronomical Clock with a very amazing laser light show, which you can view HERE. The WIkipedia article about the clock gives a whole bunch of details about all of the various components of the clock and is really quite fascinating.