Tower 25, Modern office and residential building in central Nicosia, Cyprus

Tower 25, also called The White Walls, is a 62-metre high-rise in central Nicosia designed by Jean Nouvel and completed in early 2013. Ernst & Young occupies the ground floor, mezzanine and six floors above; seven floors of apartments follow, topped by a two-storey penthouse with a pool. Each floor has a full-length balcony, and the other façades are pierced by square voids serving as windows and ventilation openings.

Designed by French architect Jean Nouvel, Tower 25 was completed in early 2013 at a total cost of about €25 million. Most apartments, including the two-storey penthouse with its swimming pool, were sold before construction began. It stands beside the Venetian fortifications of Nicosia, next to the redesigned Eleftheria Square by Zaha Hadid.

The penthouse spanning the two top floors takes its design from traditional Cypriot architecture and has a swimming pool. The name The White Walls comes from the white façades, whose square voids serve as windows and ventilation openings for the hot climate. The building overlooks the Venetian fortifications.

Tower 25 stands beside the Venetian fortifications and the redesigned Eleftheria Square, a short walk from Makariou Avenue and Themistokli Dervi Avenue. The ground floor, mezzanine and six floors above hold Ernst & Young offices; the seven floors above those are private apartments, so the interior is not open to visitors.

The south facade employs a natural temperature control system where growing plants shield apartments from summer heat while allowing winter sunlight to penetrate. This vegetation layer acts as a seasonal thermal regulator without mechanical systems.