The Warsaw Hub
The Warsaw Hub, previously known as Sienna Towers, is a complex of mixed-use buildings constructed by Belgian real estate developer Ghelamco in Warsaw, Poland. It consists of two 130-meter tall high-rises and an 86-meter building totalling around 113 thousand square meters. Construction started in the first quarter of 2016 and was completed by mid 2020, at a cost of 1 billion zlotys.
The complex was sold to Google in 2022 for around 583M euros.