Few dates can be said with certainty to mark a turning point in Church history. But July 7, 2007, is one of them. That was the day that Benedict XVI issued the apostolic letter Summorum Pontificum, sweeping away restrictions on the celebration of the older Mass. At a stroke, Benedict ensured that the Catholic Church would not be severed from its precious liturgical heritage. On our front page 10 years ago, we described the move as “the most important liturgical reform since the Second Vatican Council” – a hasty assessment that we nevertheless stand by.