Final answer:
The Colosseum faced significant destruction and looting after Rome was sacked, with marble, facades, décor, and columns being raided. Despite this, it remained standing as a monumental ruin and symbol of ancient Rome.
Step-by-step explanation:
After Rome was sacked, the Colosseum underwent significant changes due to the looting and destruction that the city of Rome faced. Built as the Flavian Amphitheater in 80 CE, the structure was an architectural masterpiece of the time and a central hub for public spectacles such as gladiator matches, animal fights, and mock naval battles. Through the centuries, as Rome was sacked by invading armies such as the Ostrogoths and Visigoths, the Colosseum suffered significant damage. The raiding of marble, facades, décor, and columns from the iconic building caused its decline. Despite this, the Colosseum's grandeur managed to withstand the test of time, enduring as a monumental ruin and symbol of the Eternal City's ancient might.