Art Nouveau museum, grand staircase, ornate ironwork banisters, stained glass ceiling, high ceilings, marble floors, intricate mosaics, luxurious velvet curtains, golden picture frames, ornamental vases, flower-patterned wallpaper, elegant chandeliers, soft warm lighting, panoramic view, 3/4 composition, shallow depth of field, grand architecture, romantic atmosphere, vintage camera, photographer in action, artistic poses, flowing dresses, curly hair, vintage accessories, mysterious expressions.