Final answer:
Egyptian, Roman, and Chinese architectural styles had spread throughout the region.
Step-by-step explanation:
The architectural styles that had spread throughout the region include the Egyptian, Roman, and Chinese styles.
In ancient Egypt, temples and pyramids were built using massive stone blocks, creating grand and intricate structures like the Great Pyramid of Giza.
Roman architecture featured grandeur and innovation, with structures like the Colosseum and aqueducts showcasing their engineering mastery.
Chinese architecture, on the other hand, emphasized harmony with nature, with examples like the Forbidden City in Beijing showcasing intricate designs and meticulous craftsmanship.