15th-century clock Prague Astronomical Clock which is over 600 years old is one of the greatest treasures of the city which still amazes people with its procession of Apostles, moving statues and visualization of time like no other instrument in the world. The ornate 15th –century astronomical clock is found on the southern side of Prague’s Gothic Old Town Hall. History Gilded and complex in design, the clock was made by Czech master clockmaker Mikuláš of Kadaň in 1410 although it has been ...