What subjects did Middle Breton mystery and miracle plays portray?

In the context of Middle Breton literature, mystery and miracle plays primarily focused on religious and moral themes intended for the education and entertainment of their audiences. These dramatic works drew their subjects from the following areas:1

• Biblical Narratives: Plays frequently depicted stories derived from both the Old and New Testaments.2
• Saints' Lives: A significant portion of the repertoire consisted of accounts detailing the lives, miracles, and martyrdom of various saints.32
• Chivalric Tales: Plays also incorporated stories of chivalry, which were typically adapted from French or Latin sources.2

While these plays were central to the dramatic tradition in Brittany and persisted for centuries, they were often noted for their didactic nature, as playwrights were primarily concerned with teaching religious and moral lessons. Notable examples of this genre include Burzud bras Jesuz ("The Great Mystery of Jesus"), Buhez santez Nonn ("The Life of Saint Nonn"), and Buhez santez Barba ("The Life of Saint Barbara").142