The tower, built in front of St. Stephen's Basilica, was built with the help of official Danish constructors, primary schoolchildren, and the mayor of Budapest. It is topped with a Rubik's cube and was built using thousands of blocks.
“This is a modern obelisk behind us and it shows that with lots of minute engineering knowledge and diligence how we can call attention to the fact that this is one of the most beautiful squares of Budapest,” Mayor Antal Rogan said, according to Architecture Lab. After saying this, he placed the last piece.
Check out this video to learn more: