VATICAN CITY  - Pope Francis will celebrate a mass next week before Easter in a youth detention centre in Rome during which he will wash the feet of inmates, the Vatican said. The Vatican said the Holy Thursday mass continued a tradition of the then Jorge Bergoglio when he was archbishop of Buenos Aires and held masses in prisons, hospitals or old people’s homes. Francis’ predecessor Benedict XVI also celebrated mass in the Casal del Marmo prison in Rome in Mar 2007. The washing of feet during mass on Holy Thursday is a tradition based on the belief that Jesus Christ washed the feet of his apostles before the Last Supper with them before his crucifixion.