Portrait of Andrea Doria as Neptune Agnolo Bronzino (1503-1572)

The picture has something of this: man, shirtless, nude, people, athlete, strength, portrait, strong, brawny, bodybuilding, torso, fitness, biceps, muscle, thorax.
Perhaps it’s a painting of a man with a long beard and no shirt, holding a wooden stick in his right hand and standing in front of a curtain.