Enjoy skip the line access to pragues astronomical clock and old town hall tower a medieval tower with a striking clock thats recognized asone of the citys most beloved landmarks learn about the history of this fascinating horologe or timepiece first constructed by clockmaker nicholas of kada in 1410 the clock itself boasts many unique features including the hourly procession of the twelve apostles between 9am and 11am and the moving figurines of vanity greed death and lust