No sooner had the flames been extinguished than debate flared up over repairing the 856-year-old cathedral: from the ethics of spending €1 billion of donations on bricks rather than people, to the speed and style of rebuilding. Prime Minister Édouard Philippe has called for a new design “suited to the techniques and challenges of our time”. The frontrunner so far? Belgian artist Wim Delvoye. His Gothic Works series of immense laser-cut steel sculptures depicts architecture and machinery in ornately filigreed metal. He’s up against British heavyweights Foster + Partners’ vision of a crystal spire, and Paris-based Studio NAB’s rooftop greenhouse and apiary. Whoever wins the coveted spot, the pressure is on to get Notre-Dame rebuilt in time for the Paris 2024 Summer Olympics. A tall order, indeed.