The Didache (The Teaching of the Twelve Apostles, c. 1st century) and Saint Caesarius of Arles on the end-times (b. A.D. 470 - d. A.D. 543).
The Didache:
"Watch for your life's sake. Let not your lamps be quenched, nor your loins unloosed; but be ready, for you know not the hour in which our Lord comes (Matthew 24:42). But often shall you come together, seeking the things which are befitting to your souls: for the whole time of your faith will not profit you, if you be not made perfect in the last time. For in the last days false prophets and corrupters shall be multiplied, and the sheep shall be turned into wolves, and love shall be turned into hate; (Matthew 24:11-12) for when lawlessness increases, they shall hate and persecute and betray one another, (Matthew 24:10) and then shall appear the world-deceiver as the Son of God, and shall do signs and wonders, and the earth shall be delivered into his hands, and he shall do iniquitous things which have never yet come to pass since the beginning. Then shall the creation of men come into the fire of trial, and many shall be made to stumble and shall perish; but they that endure in their faith shall be saved from under the curse itself. And then shall appear the signs of the truth; first, the sign of an outspreading in Heaven; then the sign of the sound of the trumpet; and the third, the resurrection of the dead; yet not of all, but as it is said: The Lord shall come and all His saints with Him. Then shall the world see the Lord coming upon the clouds of Heaven."
Saint Caesarius of Arles:
"This prince shall extend his dominion over the entire universe. At the same time there will be a Great Pope, who will be the most eminent in sanctity and most perfect in every quality. This Pope shall have with him the Great Monarch, a most virtuous man, who shall be a scion of the holy race of the French kings. This Great Monarch will assist the Pope in the reformation of the whole earth. Many princes and nations that are living in error and impiety shall be converted, and an admirable peace shall reign among men during many years because the wrath of God shall be appeased through repentance, penance and good works. There will be one common law, one only faith, one baptism, one religion. All nations shall recognize the Holy See of Rome, and shall pay homage to the Pope. But after some considerable time fervor shall cool, iniquity shall abound, and moral corruption shall become worse than ever, which shall bring upon mankind the last and worst persecution of Antichrist and the end of the world."
Painting by Gustave Doré