As Pope Leo XIV prepares to conclude his visit to France with a stop in Metz on Monday, September 28, 2026, it offers a chance to revisit the intriguing story of Clement XV, a figure known as the "self-proclaimed pope" of Lorraine. Born in the 19th century, Clement XV was a French priest who, in the early 20th century, established a small religious movement centered around a village called Clémery in Meurthe-et-Moselle. His followers regarded him as a spiritual leader, though he was never recognized by the official Catholic Church. Clement XV's movement was rooted in a mix of traditional Catholic teachings and a unique spiritual philosophy he developed. He built a modest chapel in Clémery, which his followers referred to as his "Vatican," symbolizing his belief that he was the true leader of the Church. This self-proclamation led to both fascination and controversy, as his movement operated outside the authority of the Pope and the Catholic hierarchy. Despite the lack of official recognition, Clement XV's influence grew in the early 20th century, drawing thousands of followers who were drawn to his charismatic leadership and spiritual teachings. His movement, though small in scale, became a symbol of religious independence and alternative spirituality in a time when the Catholic Church held significant sway over French society. Today, Clement XV's legacy is more of a historical curiosity than an active religious movement. However, his story remains a reminder of the diverse ways in which religious beliefs have been expressed throughout history. As Pope Leo XIV passes through Metz, the contrast between the official papacy and the once-notorious "self-proclaimed pope" of Clémery offers an interesting reflection on the evolution of religious authority and belief in France.