Cardinal Vincent Nichols attends a reception at the Urban College in Rome, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles is presented with a book on Cardinal Newman by Jack Valero as he attends a reception at the Urban College in Rome, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles and Cardinal Vincent Nichols attend a reception at the Urban College in Rome, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles and Cardinal Vincent Nichols attend a reception at the Urban College in Rome, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles visits an exhibition of Cardinal Newman's life and work at the Venerable English College, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles visits an exhibition of Cardinal Newman's life and work at the Venerable English College, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles and Cardinal Vincent Nichols attend a reception at the Urban College in Rome, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles visits an exhibition of Cardinal Newman's life and work at the Venerable English College, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles meets Melissa Villalobos and some of her children as they attended a reception at the Urban College in Rome, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles meets Melissa Villalobos and some of her children as they attended a reception at the Urban College in Rome, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles and Cardinal Vincent Nichols attend a reception at the Urban College in Rome, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles visits an exhibition of Cardinal Newman's life and work at the Venerable English College, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles visits an exhibition of Cardinal Newman's life and work at the Venerable English College, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles is presented with a book on Cardinal Newman by Jack Valero as he attends a reception at the Urban College in Rome, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles meets Melissa Villalobos and some of her children as they attended a reception at the Urban College in Rome, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Britain's Prince Charles visits an exhibition of Cardinal Newman's life and work at the Venerable English College, on the day of the canonisation of 19th-century British cardinal John Henry Newman and Italian nun Giuditta Vannini, in Rome, Italy October 13, 2019. Arthur Edwards/Pool via REUTERS

Pope Francis leaves after a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Pope Francis leaves after a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Britain's Charles, the prince of Wales attends a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Britain's Charles, the prince of Wales attends a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Pope Francis leads a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Portraits of the new saints are displayed during a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

General view of a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Britain's Charles, the prince of Wales attends a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

General view of a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Pope Francis leads a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Pope Francis leads a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Pope Francis leads a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Britain's Charles, the prince of Wales attends a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Britain's Charles, the prince of Wales attends a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Britain's Charles, the prince of Wales attends a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Britain's Charles, the prince of Wales arrives at a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Faithful gather for a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Faithful gather for a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Faithful gather for a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Faithful gather for a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Faithful gather for a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Faithful gather for a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

A priest gives instructions to other clergymen ahead of Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Faithful gather for a Mass for the canonisation of 19th-century British cardinal John Henry Newman, a Swiss laywoman, an Indian nun, an Italian nun and a nun known as the "Mother Teresa of Brazil", at the Vatican, October 13, 2019. REUTERS/Remo Casilli

Bishops attend a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi TPX IMAGES OF THE DAY

Pope Francis waves as he leaves after leading a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi

Pope Francis waves as he leaves after leading a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi

Pope Francis waves as he leaves after leading a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi

Pope Francis waves as he leaves after leading a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi

General view of Pope Francis leading a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi

General view of Pope Francis leading a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi

Bishops attend a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi

General view of Pope Francis leading a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi

A picture of Pope Paul VI is seen during a Mass for his canonisation at the Vatican, October 14, 2018. REUTERS/Alessandro Bianchi

Pope Paul VI and El Salvador's Archbishop Oscar Romero pictures are seen during a Mass for their canonisation at the Vatican, October 14, 2018. REUTERS/Alessandro Bianchi

Former Queen Sofia of Spain watches as Pope Francis arrives to lead a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi

Bishops attend a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi

Pope Francis arrives to lead a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi

Pope Francis arrives to lead a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi

Bishops are seen before a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi

Former Queen Sofia of Spain is seen before a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi

Former Queen Sofia of Spain is seen before a Mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican October 14, 2018. REUTERS/Alessandro Bianchi

A faithful takes a picture before a mass for the canonisation of the Pope Paul VI and El Salvador's Archbishop Oscar Romero at the Vatican, October 14, 2018. REUTERS/Alessandro Bianchi

A faithful holds a picture of El Salvador's Archbishop Oscar Romero before a mass for his canonisation at the Vatican, October 14, 2018. REUTERS/Alessandro Bianchi