And when were the marvels of Roman and Greek architecture - and engineering - surpassed by later European endeavors? The first seven, eight centuries after Christ look quite pitiful in this regard... What was the great invention of the medieval people? The wheel-barrow... While Christians were expecting the immediate return of Jesus Christ in the first centuries, there was no impetus to improve the living conditions here on earth.
“And when were the marvels of Roman and Greek architecture”
Actually, the Greeks and others were fifth columnists for Christ - Platos Cave Parable and Dialectic, the concept of Democracy are all very Christian concepts.
And yes, the great architecture like the Coliseum started 50 to 100 years AD.
Dont get caught up on exact dates - look at the big picture.
Highly recommend you read, "Cathedral, Forge and Waterwheel: Technology and Invention in the Middle Ages" by Joseph Gies and Frances Gies.
You will find it quite interesting.