In hoc signo vinces

"In hoc signo vinces" (Classical Latin: [in ho̞ːk s̠íŋno̞ː wíŋke̞ːs̠], Ecclesiastical Latin: [in ok ˈsiɲo ˈvint͡ʃes]) is a Latin phrase conventionally translated into English as "In this sign thou shalt conquer", often also being translated as "By this sign, conquer".

The Latin phrase itself renders, rather loosely, the Greek phrase "ἐν τούτῳ νίκα", transliterated as "en toútōi níka" (Ancient Greek: [en túːtɔːi̯ níːkaː], Modern Greek: [en ˈduto ˈnika]), literally meaning "in this, conquer".

Motto of the and monarchy. When Jesus on the cross appeared to Afonso Henriques, the first king of Portugal, before the battle of Ouriques, he gave him the Portuguese symbol, the "Quinas", and said "In hoc signo vinces". Since then it's on every Portuguese flag.

Portuguese Empire

List of Latin phrases

Eusebius (1868). . Βίος Κωνσταντίνου [Vita Constantini] (in Greek). At the Internet Archive.

"1.28"

Eusebius. "1.28". (in Greek). Passages 1.26-31 of Vita Constantini. earlychurchtexts.com.

Eusebius – Constantine and the Sign of the Cross

Eusebius. "1.28". (PDF) (in Latin). Vol. Book 1. documentacatholicaomnia.eu. p. 7 (21–22 on scanned book).

Vita Constantini

Lactantius. (in Latin). thelatinlibrary.com.

"Lucii Caecilii liber ad Donatum Confessorem de Mortibus Persecutorum"

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