#arch#, monumental Steampunk Metallic Arch with a robust, visible framework of riveted steel beams, evoking industrial grandeur and Victorian elegance. Utilize a rich palette of aged brass, darkened steel, and polished copper, complemented by distressed leather and reinforced glass, all featuring a varied, aged patina. Integrate dynamic piping, exposed gears, brass-rimmed gauges, and warm Edison bulb lighting, suggesting complex internal mechanisms and the flow of mysterious energy. Include intricate vents, exhausts, and control panels to enhance its functional, active feel, telling a story of ingenious alternate-past engineering.