Manhattan had long lost its crown as the world's skyscraper capital when Mohamed Atta smashed American Airlines Flight 11 into the first of the Twin Towers. Yet that dramatic, appalling moment triggered a defiant reaction. A slew of new towers is now appearing, on screens and on the ground.

Renzo Piano's diaphanously corporate New York Times Tower has just opened to rapturous reviews; Ground Zero is hosting towers by Foster, Rogers and Fumihiko Maki, and slick condo towers are springing up everywhere like minimalist fungus. But the latest proposal is by far the most surprising. French architect Jean Nouvel has proposed the most radical and striking skyscraper to trouble New York's low-drifting clouds in a generation.

The design for the tower, neighbouring the Museum of Modern Art, is a piercing, dangerous-looking spike, an anorexic contemporary version of the soaring twin spires of St Patrick's Cathedral, which dominated the city's skyline until the advent of skyscrapers in the early 20th century.

The proposal, at 53 W. 53rd St, commissioned by real estate firm Hines, comprises 75 storeys of accommodation and, at 350m, pierces the skyline at a height between the Empire State and Chrysler Buildings. It will embrace 5,000 square metres of extra accommodation for MoMA, which will expand into its lower floors, above retail provision, while the upper floors will house a seven-star hotel sharing services with the 120 or so (extremely) top-end condominiums above.