How did the seven wonders reflect hellenistic culture? need this answer

The Seven Wonders of the Ancient World all demanded great knowledge of maths and science in order to be planned and built.

The Hellenistic period developed a significant growth and spread of Greek culture where science, mathematics, and the arts thrived. A good example would be the Pharos of Alexandria, located in Alexandria, the center of Hellenistic culture, which needed exceptional engineering.  

napoleon the third became a empire in 1873 also known as the era of the franco-prussian war.

i need this answer                                                                 .