Herzog & de Meuron‘s 56 Leonard tower was recently completed after first breaking ground way back in 2008. Located in the heart of Tribeca it is one of the most impressive additions to the New York City skyline in years — and the interiors are no less stunning. The private facilities, also designed by the Swiss architects, span 1,5880 square metres across the ninth and 10th floors of the 60-storey building at 56 Leonard Street. Concrete is used predominantly across the two levels, which are connected up a sculptural circular staircase. In addition artist Anish Kapoor has designed a two-story sculpture that will be sited outside the building’s lobby at ground level.