Click here to see a plan of the cathedral with Viewpoint 15 marked.
A cloister (from Latin claustrum, "enclosure") is a covered walk or arcade running along the walls of buildings and forming a quadrangle or 'garth'.
The Canterbury example was refurbished in the early 1400s, and includes over 800 heraldic bosses from this period, the largest collection of medieval heraldic devices in England.
Here are just 10 features not to miss:
Pope John Paul's boss
washing trough - see Image 3 opposite
monks' 'turn' - also known as a 'rota'; in the western walk and gave access to the cellarium - see Image 4 opposite
American symbols - close to the martyrdom door - see Image 5 opposite
head of Thomas Yevele (Image 6)