It’s been a while since the Holy Father dropped his hand grenade, the motu proprio Traditionis Custodes. As readers will know, this document overturns the key provisions of a motu proprio issued in 2007 by Pope Benedict, Summorum Pontificum, which gave great latitude to individual priests who wished to offer Mass in what Benedict called the Extraordinary Form (also known as the Old Rite or the Latin Mass). Francis has reinstated serious restrictions on such celebrations, giving local bishops the power to stop the Latin Mass from being said in their dioceses.