Katedral Boulogne

{{Infobox church
| name =Katedral Boulogne
| fullname =Katedral Santa Maria
| other name =bahasa Prancis: Cathédrale Notre-Dame de Boulogne
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| image =Boulogne-sur-mer cathe1.JPG
| imagesize =265px
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| imagealt = | caption = Katedral Boulogne
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| coordinates = | osgraw = | osgridref = | location =Boulogne-sur-Mer
| country =[[Prancis}}
| denomination = Gereja Katolik Roma
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| status =Katedral
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| metropolis = | diocese = Keuskupan Arras
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Katedral Boulogne yang bernama resmi Katedral Basilika Bunda Maria Yang Dikandung Tanpa Noda, adalah sebuah gereja basilika minor Katolik dan bekas katedral yang terletak di Boulogne-sur-Mer di département Pas-de-Calais Perancis utara. Basilika, sebuah bangunan terkenal di kota ini dengan kubah setinggi 101 meter, dibangun antara tahun 1827 dan 1875 di lokasi katedral abad pertengahan Boulogne: basilika ini masih dikenal secara lokal oleh penduduk setempat sebagai "katedral", meskipun gereja saat ini tidak pernah memiliki status tersebut.