An early 17th-century prayer card to the Four Crowned Martyrs, a team of stonemasons - traditionally named Claudius, Nicostratus, Simpronian, and Castorius - who worked in the imperial quarries and workshops at Sirmium. Claudius and his companions were said to have made a number of ornate carvings for Diocletian, but when they refused to build a statue of Aesculapius, the emperor ordered them to be sealed in lead chests and drowned in the River Sava. These saints kept their popularity in medieval England, being recorded in over fifteen Benedictine calendars. Owing to their craft, they were adopted as patrons of the guilds of stonemasons, whose articles directed the reader to find out more about them in the Legenda Aurea.
A meditation from Gregory the Great on patience reads, We can be martyrs without the pain of iron or flame, if we endure suffering with faith in our hearts.
This meditation is followed by an injunction to pray for our enemies.