Ostankino Tower
Construction began in 1963 and was completed in 1967. Extensive use of prestressed concrete resulted in a simple and sturdy structure. It surpassed the Empire State Building to become the tallest free-standing structure in the world. It held this record for eight years until it was overtaken by the CN Tower in Toronto, Canada in 1975, which surpassed its height by . The Ostankino Tower remained the second-tallest free-standing structure in the world for another 32 years until the Burj Khalifa surpassed both it and the CN Tower in height in 2007. The Ostankino Tower has remained the tallest structure in Europe for over 50 years.