In hoc signo vinces
"In hoc signo vinces" is a Latin phrase often translated into English as "In this sign thou shalt conquer." Alternately, it is sometimes translated as "In this sign, be victorious," along with other similar translations. It is a loose rendering of the Greek phrase "ἐν τούτῳ νίκα (en toútō níka)", lit. 'in this, be victorious.' Either variant originates from a religious vision by Constantine the Great that precipitated the Christianization of Rome, with the 'sign' referring to either a Chi-Rho or a Christian Cross.