Leonardo da Vinci is arguably the most famous painter to ever live, most of his work was painting portraiture he painted standard and formal portraits mainly this is when the main focus is the model in the frame, they have nice clothes on. The framing was normally done by thirds for lots of his work with the shoulders and upper torso taking up one third and then the head and the empty space above the head taking up the rest. He has the subject doing different poses and facial positioning in most of his paintings, some are looking straight then others to the side some are looking forward with different body positions and have their shoulders facing off to the side.