Cibona Tower, Zagreb

The Cibona Tower is a tall building situated in the heart of Zagreb, specifically on Dražen Petrović Square, near the intersection of Savska and Kranjčevićeva streets. It was constructed in 1987 in preparation for the Universiade event hosted in Zagreb that year. The tower's architectural design was the work of Marijan Hržić. It stands at a height of 92 meters (approximately 307 feet) and boasts 25 levels above ground. At its roof, there is a radio mast that extends its total height to 105 meters (about 350 feet). The tower is part of a larger complex that includes various commercial buildings, a basketball hall with a seating capacity of 5,400, and an art installation.

The skyscraper itself takes on a cylindrical shape with a diameter of 25 meters (approximately 83 feet). It gradually tapers in diameter through four stages, culminating with the radio mast. Its facade is constructed using dark steel, fully reflective glass, and black granite. Interestingly, the windows are not fixed in place. The first stage reduction occurs at the 21st floor, followed by the second at the 23rd floor, the third at the 24th floor, and the final reduction at the 25th floor. The stability of the tower is ensured by 26 reinforced concrete pylons along its rim, making it resilient against a Richter scale earthquake with a magnitude of 7° and even the impact of a smaller aircraft.