Hadrian's Library, Athens

While not much remains of this Roman-era library today, back in the 2nd century AD, it was the place to be. Imagine a massive cloistered courtyard, a hundred grand columns, and enough space to make even the most extravagant book hoarder jealous. And who do we have to thank for this intellectual paradise?—Emperor Hadrian, the ultimate fanboy of Greek culture. In fact, he was so enamored with it, that they nicknamed him “Graecula” (which means “Little Greek”).

He decked out this sprawling complex with art galleries, lecture halls, and a magnificent public space—because why stop at books when you can have everything? His reign ushered in a golden age of peace and prosperity, giving arts and culture a serious upgrade across the empire.

In its prime, the library housed precious papyrus scrolls and exquisite artworks—until the barbaric Herules (from modern-day Germany) came knocking (not for a book club meeting, unfortunately). After their invasion, a Roman official named Herculius took on restoration duties, but history had more plans for the ruins. Over time, they became the foundations for not one, not two, but three different churches—a Byzantine one in the 5th century, another in the 7th, and a cathedral in the 12th. That's what they call re-purposing real estate!

These days, the site is finally open to the public, though excavation is still ongoing. A few original Corinthian columns have survived the centuries, hinting at the library’s former grandeur. And here’s a fun twist: the remains of the Tetraconch Church, smack in the middle of the ruins, were built entirely inside the library’s old courtyard.

Tip:
Your Acropolis ticket covers entry, so if you’re in the area, it’s a no-brainer to check it out. Or, if you’re feeling more mysterious, just walk along the perimeter fence and steal a few glances through the gaps—because who doesn’t love a little architectural intrigue?