Retro Mid-Century Travel Poster

Design a vertical retro mid-century travel poster of city_name showcasing landmark. Stick to a tight 3-color scheme: cream-toned paper background, black technical line drawing, plus one accent_color accent. Aesthetic: minimalist isometric top-down aerial perspective with very fine cross-hatching and silkscreen print grain. Color rules: fill the entire sky in flat solid accent_color, add small accent_color touches on rooftops or street details. Zero gradients allowed. Typography: large bold sans-serif "city_name" at the top in cream, with the city's name in its native language set smaller in cream beneath it.