Now let's talk size. This was meant to be the largest temple in ancient Greece, and it succeeded. The temple measured about 100 meters by 50 meters, with columns about 17 meters high. Picture a building as tall as a five-story apartment block, repeated in a forest of stone. In its prime under Hadrian, the temple was octostyle and dipteral. That means eight columns across the narrow ends and 20 down each long side, arranged in two surrounding colonnades. In total, 104 columns enclosed the central cella, the inner room of the temple. The columns are Corinthian in style, topped with the leafy carved capitals you can still pick out against the sky. Hadrian also surrounded the temple with a walled, marble-paved precinct, which made it a central focus of the ancient city. He filled the sanctuary with statues of himself, gifts from the cities under his rule. As the Official Athens Guide puts it, size did matter when it came to paying tribute to Zeus. Look at the base of a column and then trace it upward, and you get a feel for the ambition.