For easy recognition of the items on a coat of arms, and hence the quick identification of the owner, bold simple shapes are best. Hence, simple geometric shapes are often used for this purpose A Complete Guide to Heraldry, A.C. Fox-Davies, Bonanza (re-print of 1909 Edition), New York, 1978, P146 One of the simplest such shapes is the plain circle, known to heralds as the roundle. A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Roundle So popular is this charge that a shorthand has arisen for roundles of a particular colour and torteau is a roundle gules, or red. (We must be careful however not to confuse this with the word in French heraldry, in which torteau means roundle and must have the colour specified.) Most authorities agree that the English usage signifies the “Manchet cake” or communion wafer and thus is a symbol of religious allegiance.