(Reuters) – Hundreds of Catholic worshippers gathered for prayer and song outside Notre-Dame cathedral in Paris on Good Friday, three years to the day after its roof was destroyed in a massive blaze. Notre-Dame has been closed for restoration since the fire in 2019 gutted its roof and sent its spire crashing down, to the horror of the nation and tourist onlookers. A few hundred people gathered on Friday on the Ile de la Cite, in the middle of the river Seine, to listen to a sermon under the shadow of a crane and scaffolding that has cloaked the 12th-century church since the blaze. “We believe …