Diese öffentliche Vorlesung wird jährlich veranstaltet im Andenken an den Kirchenhistoriker Hans Lietzmann (1875-1942), den Nachfolger Adolf von Harnacks als Leiter des Akademienunternehmens Die Griechischen Christlichen Schriftsteller der ersten Jahrhunderte (GCS). Es wird dazu jeweils ein international bedeutender Referent aus dem Bereich der Altertumswissenschaften eingeladen. Die Vorträge behandeln zentrale Themen der antiken Religionsgeschichte mit einer Bedeutung für die Gegenwart.
Henry Chadwick was a British academic, theologian and Church of England priest. A former dean of Christ Church Cathedral, Oxford – and as such, head of Christ Church, Oxford – he also served as master of Peterhouse, Cambridge. A leading historian of the early church, Chadwick was appointed Regius Professor at both the universities of Oxford and Cambridge. He was a noted supporter of improved relations with the Catholic Church, and a leading member of the Anglican–Roman Catholic International Commission. An accomplished musician, having studied music to degree level, he took a leading part in the revision and updating of hymnals widely used within Anglicanism, chairing the board of the publisher Hymns Ancient & Modern Ltd. for 20 years.