Pope Francis (C) leads a Holy Mass on Knyaz Alexander I square in the Bulgarian capital Sofia, on May 5, 2019. - Pope Francis arrived in Bulgaria, where he will meet members of the tiny Catholic community, but the main Orthodox Church has rejected the idea of holding joint prayers with the pontiff. The three-day tour, which also takes in North Macedonia, includes a visit to a refugee camp on the outskirts of Sofia and a commemoration of Mother Teresa, the most famous native of the Macedonian capital Skopje. (Photo by Andreas SOLARO / AFP)