Designed by Grażyna Bielska–Kozakiewicz and Mariusz Kozakiewicz, this triangular prism with sequences of numbers commemorates the three Poznań University graduates who deciphered Enigma messages during WWII: Jerzy Różycki, Marian Rejewski, and Henryk Zygalski. The monument was unveiled in 2007 and stands right in front of Poznań's Imperial Castle, which was a university building in pre-war years. Just next door is the sparkling new Enigma Cipher Centre, a museum dedicated to the lads' mathematical feat. For more about the story that Hollywood omitted, head to our full-length article.