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San Marco basin (Italian: Bacino San Marco; Venetian: Basin de San Marco) in Venice, Italy, is an area of the Venetian Lagoon that faces the Riva degli Schiavoni and Doge's Palace of the San Marco sestiere.

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45°25′46″N 12°20′42″E / 45.4295°N 12.3450°E / 45.4295; 12.3450