The correct answer is the Berlin Wall.
The Berlin Wall was built in 1961 in order to separate West Berlin, which was controlled by the US, France, and Great Britain, from East Berlin (which was controlled by the Soviet Union). This wall split up families and became a significant piece of symbolism during the Cold War era. This wall symbolized the stark differences between the United States and Soviet Union on how a society should be run, as East and West Berlin were run in two completely different ways.
According to the National Conference of State Legislatures, the number of seats in the lower house of state legislatures varies from a high of 400 in New Hampshire to a low of 40 in Alaska. But what really matters is how much population each legislator represents. The table lists the 10 states with the highest and lowest populations and the population per legislator. California has by far the largest population per district, New Hampshire the lowest.