Strasbourg Cathedral is one of the most important and beautiful Gothic buildings in Europe, the church was built in 1015 until it was completed in 1439, and it took 414 years to go. Inside the church is an eleven-meter-high astronomical clock, which was previously seen in Prague and Bern, outside, but built indoors. The clock was built in 1838, and every fifteen minutes there are children, youth, young people, and elderly people representing the four stages of life robots out to find travel. Every time they arrive at the hour, there is death with a board axe out to report the time. The astronomical clock is accurate to date, which may be related to better indoor maintenance.