The Guardians were concieved as part of the rebuilding project of Manhatten's post 9/11 financial district. The concept for the Guardians is simple: To repsect the past and to send a message about the future. In doing so the Guardians wear a cloak of the original Yamasaki design of aluminum and glass panels. Rising above the old are the new sculptural features: A helmed knight standing over the city. The Guardians symbolize a beacon of hope, unity and strength.