Text: Erected over an older Byzantine-style castle, the present 14th- to 15th-century Flamboyant Gothic building fronts the Piazzetta and the basin, the first building to behold upon arrival in Venice.
Entailment: There is a Flamboyant Gothic building built on top of an old castle.
Contradiction: The first building one sees up arriving in Venice was built in the 1960s.