Ostuni's ‘White City’ is the historic urban area on its hill, not a single monument. The municipality describes whitewashed homes and lanes within the historic centre and names the Cathedral as a distinct monument within that wider fabric.1
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Ostuni whitewashes itself every year by ordinance born of plague defense, and the hill town reads as one white sculpture above the olive plain. Its lanes spiral up to a Gothic cathedral with a fifteenth-century rose window.
