| The cult of the sudarium began in the twelfth century in St Peter's, and in the Western Church. |
| As is normal in representations of the Last Judgment, the sudarium does not appear among the arma christi born by angels in the uppermost zone of the fresco. |
| Augustus Csar, who was particularly liable to catch cold, continually used a focalium or sudarium. |
| Successive excavations have rendered accessible a remarkable series of remains, including several baths, a sudarium, and conduits. |
