What is the fine-grained topic of the following text: Notable at St. Paul’s are the mosaic portraits of all 266 bishops of Rome … and says Eleonora our city guide, “There have never been two living popes, so it is more than unusual to have both Papa Francesco and Papa Ratzi up there at the same time.” I didn’t think that was so unusual at all. Only return the topic.
Mosaic portraits of popes at St. Paul's