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The Palazzo Querini Dubois, also known as Giustinian Querini is a Renaissance-style palace in located on the Grand Canal, between the Palazzo Bernardo a San Polo and the Palazzo Grimani Marcello in the sestiere of San Polo of Venice, Italy. It stands across the canal from the Palazzo Corner Spinelli. A second façade faces the rio delle Erbe. Opposite is Palazzo Querini Benzon.