You raise an excellent point - but in the case of Our Lady of Kazan, the West would be right in claiming it as an icon honoured by all Christians, even though it is of Eastern Church provenance.
East and West have much less of a problem venerating each other’s sacred images (such as the Orthodox icon of “Our Lady of the Scapular” in Horodyschenske in Ukraine). And Rome will at times receive an Orthodox saint into its calendar such as St Gregory Palamas (formerly pilloried by Western theologians as a “quietist” e.g. Fr. Holweck, Dicitionary of Saints). Sts Vladimir and Olha and Vladimir’s sons, Boris and Hlib are all in the Roman canon of the Saints, even though they were glorified by the Orthodox Church.
Alex
