The article discusses a new luxury high-rise residential tower called Herzog & de Meuron's 56 Leonard Street that is under construction in New York City's Tribeca neighborhood. The 80-story tower will offer luxury amenities and residences ranging from studios to 4-bedroom penthouses, with prices starting at over $3 million. When completed in 2017, 56 Leonard Street will be one of the tallest buildings south of Canal Street in Manhattan.