Ancient Roman architect, Vitruvius, standing in front of a stone pedestal, holding a scroll with his famous work "De Architectura" inscribed, white toga, brown leather sandals, wise facial expression, beard and mustache, classical Roman hairstyle, subtle wrinkles on forehead, gentle smile, background of an ancient Roman library, marble floors, high ceilings, rows of bookshelves, warm soft lighting, afternoon sunbeam filtering through the windows, subtle dust particles floating in the air, realistic texture, detailed architecture, Renaissance style, harmonious composition.