Apollo Belvedere

early 2nd century CE

Marble. Vatican Museums, Vatican City

Look at the line of the body: it bends in a slow S from the turned head down through the hip to the back foot.

Look at

The head turns one way while the outstretched arm reaches the other, so the figure twists instead of facing you square.
One leg carries the weight and the other trails, which tips the hips and starts the curve.
The cloak hangs from the shoulder in deep, shadowed folds that set off the smooth skin beside them.
The surface is worked to an even white, and the face stays calm; nothing in the carving suggests effort.

A Roman copy of a Greek bronze of about 330 BCE. Apollo has just loosed an arrow; the outstretched hand once held the bow.

Image: Wikimedia Commons · Public domain (photographer's release)