Question: What year did the famous amusement park across the street from Axeltory open?

Related documents: [0]  [DOC] Tivoli Gardens (or simply Tivoli) is a famous amusement park and pleasure garden in Copenhagen, Denmark. The park opened on 15 August 1843 and is the second-oldest operating amusement park in the world, after Dyrehavsbakken in nearby Klampenborg, also in Denmark. [END] 
[1]  [DOC] Axeltorv is a public square in central Copenhagen, Denmark, located across the street from Tivoli Gardens' main entrance on Vesterbrogade. [END]  
Answer: 1843
1843