Paris is making final preparations for Pope Leo XIV's first official visit to the French capital in 18 years, with volunteers welcoming crowds ahead of his four-day trip. His programme includes meetings with President Emmanuel Macron and UNESCO, a popemobile procession, a prayer service at Notre-Dame, a youth vigil at the Stade de France, and a mass at Place de la Concorde expected to draw up to one million people before he continues to Lourdes and Metz.