The ring and his gaze show us his status. Worn on his right index finger, his ring explains to us that he is a man of authority and power.
His rapier shows us his agility in battle. A rapier is a long, thin sword intended for civilian duels. It is a sport that will later give birth to fencing.
His clothes tell us that he is Spanish but that he is not part of high society. The coat of arms and the Latin inscriptions are cut which does not allow us to decipher them. Could it be a knight?
Spain
Late 16th century