Restrictions don't always lead to something bad. Let's look at the Blue Mosque in Istanbul - it is adorned with stunning patterns, yet there are no images of people or other living beings, because this is prohibited by Islamic norms. The restriction influenced the architecture, resulting in interiors like these:
Or take Amsterdam as an example. At one time, taxes in the city depended on the width of a building's façade, so future homeowners constructed rather narrow but tall houses. As a result, a distinctive Amsterdam architectural style emerged.
It's worth noting that these are rare examples - there are more cases of the opposite. One might recall the Soviet Union, where in 1955 a decree titled "On the Elimination of Excesses in Design and Construction" was issued, after which the country began building plain, faceless panel Khrushchyovka apartment blocks.