The building is built on 132,500 square meters and contains a huge amount of stores and offices, a hotel and conference center, movie theater and an impressive film history museum.
The building was designed by architect Helmut Jahn in 2002, and was built for the price of 750 million euros, and it is not difficult to imagine which company it was built...for Sony of course. In 2008 the center was sold for 600 million Euros to investors.
Before World War II the square was a trading area full of people and cars. With the bombings over Berlin, almost the entire area was destroyed. Because of its proximity to the Berlin Wall, the square was abandoned, and only after the Berlin Wall was taken down was the square reopened.
By the way, your kids would be really thankful if you would take them to the Legoland Discovery Center.