How do the hagia sofia and arc de triomphe landmarks serve different purposes? a. the hagia sofia serves as a cemetery; the arc de triomphe serves as a bridge between eastern and western paris. b. the hagia sofia is the headquarters of the turkish government; the arc de triomphe is a prominent train station. c. the hagia sofia has religious significance; the arc de triomphe honors the heroes of the french revolution. d. the hagia sofia was an observatory in ancient times; the arc de triomphe bore the tombs of roman kings. reset next'