the cathedral church of the Roman Catholic Archdiocese of Venice, northern Italy. It is the most famous of the city's churches and one of the best known examples of Italo-Byzantine architecture. It lies at the eastern end of the Piazza San Marco, adjacent and connected to the Doge's Palace. Originally it was the chapel of the Doge, and has been the city's cathedral only since 1807
who would be walking in Venice next week, on the Easter vigil; but that I myself might be the minute personage whom, in an enlarged photograph of St. Mark’s that had been lent to me, the operator had portrayed, in a bowler hat, in front of the portico)
Marcel Proust. In Search of Lost Time [volume 1]
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Anyhow, a first class railway carriage ceased to be regarded as a priori more beautiful than St. Mark’s at Venice.