Answer:
Modern Architecture uses specially manufactured insulation, while some ancient buildings used no insulation at all.
Modern buildings are fire proof, while some ancient buildings had no such measures.
Modern architecture requires the following of strict codes and guidelines, while most ancient societies had no regulations.
Modern architecture is made of materials such as: Concrete, standardized bricks, ect. While ancient architecture used whatever materials could be found around. Ex: houses near Cairo stole bricks from the Great Pyramids of Giza.