Professor Etienne Rynne's lecture discusses three significant pieces of Irish early Christian metalwork: the Tara Brooch, the Ardagh Chalice, and the Derrynaflan Hoard. He shares insights from his experience with the Ardagh Chalice and critiques the Derrynaflan Chalice as a lesser imitation. The lecture includes anecdotes and commentary on the craftsmanship and historical context of these artifacts.