“Paris yesterday unveiled plans for a vast glass-enveloped office block that will become its tallest commercial building and loftiest construction since the Eiffel tower was inaugurated in 1889. The ‘Phare’ (Lighthouse) tower, designed by the Californian architect Thom Mayne, is a gently sloping eco-friendly glass construction complete with wind-turbines on its roof, that will be the centrepiece of an ambitious overhaul of La Défense on the western outskirts of the city.”