As a former Baptist, I have lots of Judaized remnants left over in my mind.
For example, here's some abandoned Protestant thoughts on the end of the world!
-Yaay, the Rapture!
-the 7-Year reign of the Anti-Christ (three years of happiness, three years of Tribulation)
-war against the Anti-Christ at the Valley of Armageddon, blood up to the horses' girdle!
-Jesus returns in the clouds with His white horses and his holy weapons to finally kill the Anti-Christ
-1000-year Millenial Reign! Praise Jesus! New Jerusalem, and all that!
-Sometime after that, the Earth melts. The stars melt. Your face melts.
Anyway, I'm beyond that at this point in my life. Now, I've matured to believe in the Three Days of Darkness, when demons prowl outside, knock on your door, and kill you instantly, unless you cower in your house with your blessed candles! What strides I've taken!
Well, anyway.
Lately, I've been reading E. Michael Jones' Jєωιѕн Revolutionary Spirit. It occurs to me that we Christians had a pretty good deal from about Constantine I around 300 AD until the late 1300s, right around the time after Spain either had Jєωs convert, or expelled them. Shortly after that, in the 1400s, Jєωs really spread their influences throughout Europe and began the troubles for Christendom all over again--and soon we shall likely experience life pre-300AD.
So, with that in mind:
Is the year from 300AD until 1300AD the Millenial Reign?
I could swear that I heard or read somewhere that a doctor of the Church stated that the Millenial Reign has already happened.