Cardinal Christoph Schönborn of Vienna has given an ultimatum to supporters of the "Call to Disobedience" challenging Church teaching. The Sistine Chapel Choir will sing as a single chorus with the Westminster Abbey Choir at a historic papal Mass tomorrow. The Institute for Works of Religion, or Vatican Bank, is holding a media open day today for the first time in its history. An American software company has released the first Catechism of the Catholic Church mobile application. Sandro Magister argues that the "Vatileaks" scandal has strengthened Opus Dei's influence in Rome. Bishop Philip Tartaglia of Paisley suggests that Christians "may need to pick up the pieces of a shattered civilisation". Tim Stanley says that the Leadership Conference of Women Religious (LCWR) "represents the past, not the future" of the American Church. And an Italian company has given Pope Benedict a two-seater electric car with a top speed of 62 mph. For updates throughout the day follow me on Twitter @lukecoppen