The astronomical clock on the side of Prague Square is also a must-see attraction. It is said that its history can be traced back to 1410. Now it is 9:00 to 3:00 every day. When the hour is full, the top door will open and the 12 disciples will appear one after another. The tourists downstairs are crowded with people, densely packed with mobile phones, and the square and the astronomical clock are also the places where the tour group must come. Tips: In the summer of July, I want to wait until at dusk at least after 9 pm, it is more difficult for a player who has just arrived in Europe, but I have been here in the early morning, but it is really beautiful, but the whole time is 12 The disciples appeared from 9:00 to 23:00 every day, so in the early morning, although there were few tourists, they still could not see. If you want to take a scene of 12 disciples, you must find a good position, facing the astronomical clock. There are two rectangular blue small windows and doors on the top of the two big clocks.