The Cathedral of Saint-Pierre in Angoulême, south-west France—a sumptuous 12th- century Romanesque building that was reworked by Paul Abadie, the architect behind the Sacré Coeur basilica in Paris—has had a 21st-century makeover: its treasury has been given the gesamtkunstwerk treatment by the French artist Jean-Michel Othoniel. His intricate three-room work Trésor (2016), which houses around 200 objects, is full of his signature round glass bead and tracery work. The artist was inspired by historic sources such as Romanesque art’s geometric designs and the Arts and Crafts movement, and says his work fits in with the building’s history. “Abadie already worked with the original Romanesque design. I’m following him, in a continuum,” he says.