Grandiose exhibition center, Art Nouveau architecture, intricate ironwork, ornate decorations, curved lines, flowing organic forms, stained glass ceiling, majestic chandeliers, polished marble floors, elegant spiral staircases, luxurious velvet drapes, refined wooden paneling, subtle warm lighting, soft focus, shallow depth of field, 3/4 composition, warm beige and gold color palette, refined lady, long curly hair, pearl necklace, lace gloves, flowing white dress, holding a fan, admiring the artwork, gentle facial expression, sophisticated atmosphere, late afternoon sunlight filtering through the windows.