A majestic portrait of Charlemagne. On his head, he wears a small, narrow golden circlet. The circlet is a low-profile horizontal band made of 6 tiny rectangular gold plates. Each plate is decorated with blue and green enamels and a small central gemstone. The object is small enough to fit perfectly on top of his head, exactly like a thin diadem. The top edge is perfectly flat with NO spikes. Charlemagne has a long white beard and wears royal robes. Dramatic lighting, 8k, hyper-realistic.