College, Rome. Episcopal ministry Tartaglia was appointed the fourth Bishop of Paisley on 13 September 2005. The see had been vacant since October of the previous year, when John Mone retired after sixteen years. He was consecrated bishop on 20 November 2005, at St Mirin's Cathedral in Paisley. Mario Conti, the Archbishop of Glasgow, served as the principal consecrator, with Raymond Leo Burke and Mone being co-consecrators. Tartaglia attacked UK law relating to the family in 2006. He outlined his opinion that the Family Law Act 1996 – which made divorce quicker and easier – civil partnership legislation giving homosexual relationships legal status, and the Gender Recognition Act – which allowed people to change their gender designation – would undermine the family in society. He stated, "Unfortunately, in our times, the minds of many have been so darkened by hubris and by the selfish pursuit of their own gratification that they have lost sight of the natural law which God has written into his creation...". He reiterated this stance in 2010, when he wrote to David Cameron to insist that "the Catholic Church will not register civil partnerships nor celebrate same-sex unions: not now, not in the future, not ever, no matter what legislation or regulations your government enacts or endorses." He also criticised the UK government's decision to upgrade its nuclear weapons capability. As president of the National Communications Commission of the Bishops' Conference of Scotland, Tartaglia wrote to every parish in Scotland in May 2008, decrying the media for pushing a "secular and humanistic agenda". Arguing his belief that "over two-thirds" of Scots are actually Christians, and that the proportion of people who work in the media does not reflect this, he wrote that this led to a "fundamental disconnection between the provider and the consumer". Tartaglia was mooted by some commentators in 2008 as a possible successor to the see of Westminster. Archbishop Vincent Nichols was appointed. Tartaglia was appointed the Archbishop of Glasgow on 24 July 2012, succeeding Archbishop Mario Conti. He was installed at St Andrew's Cathedral on 8 September of that same year. He received the pallium from Pope Francis at a Mass in St. Peter's Basilica on 29 June 2013. Pope Benedict XVI appointed Tartaglia as the apostolic administrator of the Archdiocese of Saint Andrews and Edinburgh on 27 February 2013, holding the post until Leo Cushley was enthroned on 21 September 2013