The picture above shows the nave ceiling of Sherborne Abbey. Much of the current church dates to the 15th century, though the nave arches are Norman. The arches support a superb late medieval fan-vaulted roof, decorated with painted bosses. There are 115 bosses on the nave roof. One features the rebus, or symbolic pun on the name of Abbot Ramsam. Other bosses depict a mermaid, pelican of piety, Tudor roses, St Michael slaying a dragon, foliage patterns, and strange beasts.