Amidst the hordes, such mighty wroth:
my bloodline doth elate.
Posterity hath, though, borne aloft
my banner as the Great.
Springing forth my namesake there,
outhewn from Hellas’ opal,
that city which was brought to bear:
her name Constantinople.
For years to pass there was beholden
Thy glory all so clear.
The Great City’s holy site, golden:
there stood Hagia Sophia.
Therein however I bade Thee
to grant portent or sign.
Thou didst forsooth bequeath to me
one sacred and divine.
I stand upon the ever-brink,
Rome’s beauty lies thereunder.
Thy truth through me starteth to sink,
it striketh me like thunder.
The sun blindeth my weary eyes
as I gaze over yonder;
whereupon thou revealest me:
In this sign, you will conquer.
Emperor Constantine I, or the Great, was the first Roman Emperor to legalise Christianity, and did himself convert. It was also he who named Constantinople.
The Chi-Rho (☧) is a famous Christian symbol that was revealed to Saint Constantine in a dream. It is comprised of the first two letters of 'Christ' in Greek (ΧΡ). Therewith, in that dream, Constantine heard the message: "In this sign, you will conquer," as my last verse refers to!