With the celebration of the Extraordinary Jubilee of Mercy indulgences have once again moved to the fore of Catholic imagination, with many pilgrims availing themselves of the opportunity to pass through a Door of Mercy or ‘Holy Door’ and thereby receive the jubilee indulgence. While the practice of indulgences has experienced something of a revival in popularity during recent papacies, the precise doctrine remains largely unrehearsed and unfamiliar, simultaneously evoking strong reactions of distaste and disquiet among many as memories of medieval abuse linger on. This article sets out the precepts of the most recent authoritative teaching on indulgences, itself almost fifty years old, before exploring the theological interpretation offered by Karl Rahner and tracing its gradual and largely anonymous appropriation in papal teaching through the post‐conciliar period. With Pope Francis promoting mercy as a central theme for his papacy and ecclesial vision, the paper closes by considering how he may be proposing a further re‐appropriation of indulgences which shifts attention from their post‐mortem efficacy to their capacity to establish a Franciscan reflexivity of mercy in the contemporary church.

Using Lumen gentium as a focus, what can we say about the unfinished business of renewal? How does it work, and how must we read Lumen gentium in order to grasp “what remains to be done”? We consider four issues, each of them in dialogue with one of four theologians who reached their 60th birthday in 1964, the year Lumen gentium was completed. Bernard Lonergan helps us come to terms with the historically conditioned nature of Lumen gentium itself. Karl Rahner points the way towards a better grasp of Lumen gentium's discussion of the place of other religions in the economy of salvation. John Courtney Murray's influence on the Council fathers is a case study in the importance of the local church. And Yves Congar's willingness to rethink his own positions testifies to the importance of not making Lumen gentium into unchanging truth. Overall, the unfinished business of the document on the Church is to learn to treat it, in Lonergan's words, as “not premisses but data.”