Maybe, this right that outside Grenoble, Lyon is the closest french major city to Switzerland (about 150 km)
Lyon is closer to Zurich architecturally
Outside Fourviere, Vieux Lyon, Croix Rousse, and Presqu'ile. Lyon has mainly a 20th century architecture.
And closer to Paris in cleaness

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I would not say that Lyon is dirty as Marseille or Paris but I would not say that Lyon is clean.