Which of the seven wonders of the world had a truly practical purpose?
Correct answer: Lighthouse of Alexandria
Paulus of Tarsus
It's considered an important symbol of ancient engineering and maritime navigation, and its name, Pharos, even gave rise to the word "lighthouse" in many languages. When I went to Alexandria, Egypt, in 2020, I was amazed to see the flag of the city has the outline of the lighthouse in it!