Why did Hadrian complete the Temple of Olympian Zeus?

Emperor Hadrian completed the Temple of Olympian Zeus in Athens as part of his extensive efforts to patronize and embellish the city, which he held in high regard due to his deep-seated philhellenism (love of Greek culture).123

The project, which had been initiated by the Peisistratid tyrants more than 600 years earlier, served as a monumental centerpiece for the new eastern suburb of Athens. Hadrian’s completion of the temple was a significant act of imperial favor that reinforced his connection to the Greek world; following its dedication, he assumed the title Olympius. This project was one of many benefactions Hadrian provided to Athens, including the construction of a library, a gymnasium, and a pantheon, all of which helped solidify his role as a major benefactor and restorer of the city's cultural prominence.231