Canterbury cross

It is so called because it was designed after an Anglo-Saxon brooch, dating c. 850 that was found in 1867 in Canterbury, England.

[1][2] The original cross, kept at the Beaney House of Art and Knowledge in Canterbury, is a bronze cruciform brooch, with triangular panels of silver, incised with a triquetra and inlaid with niello.

[3] This cross features a small square in the centre, from which extend four arms, wider on the outside, so that the arms look like triangles, symbolising the Trinity.

The tips of the arms are arcs of a single circle, giving the overall effect of a round wheel.

[4] The cross is also used as the logo of the Anglicanorum Coetibus Society, which supports the Personal ordinariates of the Catholic Church.