Aluminium "wizard hat" tops New York library renovation by Mecanoo

A sculptural aluminium crown tops New York's Stavros Niarchos Foundation Library, which has been renovated by Dutch practice Mecanoo and American firm Beyer Blinder Belle.
Formerly called the Mid-Manhattan Library, the steel and granite library dates from 1914 and was built as a department store.
Its original structure has been retained and the renovation introduces a three-storey "vertical library", business and educational facilities and a publicly accessible rooftop garden and café