Gothic architecture, ancient stone walls, weathered bronze statues, intricate aquilas, Imperial Eagles, grimdark atmosphere, dark grey stone pavement, flickering torches, eerie red lighting, misty fog, mysterious artifacts, ancient tomes, leather-bound books, worn metal gears, rusty pipes, industrial machinery, cogwheel mechanisms, forge-like backgrounds, detailed metallic textures, worn stone carvings, skulls, bones, Imperial Fists, Bolters, Power Fists, ornate armor, Space Marine helmets, iconography of the Imperium.