The mirror has been called a four cornered god because it reflects what it sees truthfully and it has no preconceptions. This is the reason why it is called "god". It is also referred as "four- cornered" because it reflects whatever it sees in all directions and that too truthfully.
Four-Cornered Circle was created in 2007.
Four Cornered Night was created on 2000-08-29.
"Square sails" which are not really square, were/are referred to as four-cornered sails.
square
A Four Cornered Triangle - 1918 was released on: USA: 21 January 1918
A quadrangular is a four-cornered shape.
The cast of A Four Cornered Triangle - 1918 includes: Agnes Ayres Edward Earle
Square sails (rectangular) were (are) called four-cornered sails.
"Four-cornered" sails were (are) square.
"Four-cornered".
Square sails are referred to as four-cornered sails.
Hawaiian Eye - 1959 Four-Cornered Triangle - 3.21 was released on: USA: 14 February 1962