[PUGACHEV]

"a circular space that rotated day and night to imitate the Earth's movement and impress his guests"

If the Romans were not aware that the Earth was round, how could they know that a rotating banquet hall could imitate the Earth's movement. Sure, they saw the Sun rise in the East and set in the West, and the stars fly around overhead at night, but didn't they think that the Sun traveled across the sky, and the stars move fixed on spheres around a stationary Earth?

[centurion316]

I believe that both the Greeks and the Romans believed that the Earth was a sphere. That understanding was forgotten by later generations.

[Bubba Ho-Tep]

The ancients knew the world was round. In fact, Greek named Eratosthenes was able to calculate its circumference with a great deal of accuracy around 240 BC. Also, ancient statues of Atlas show him holding a spherical earth.