The towers of Notre Dame are one of the most famous sights in the world. Both climb 68 metres into the sky and visitors trek up 387 steps to their tops for some of the best views of Paris.
They were begun in 1200 when construction on the western facade got under way. The north tower, briefly threatened by the flames of the April 2019 blaze, was completed in 1240. The southern tower was finished ten years later.
Image Source: Getty/ Miguel Medina