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Federico II re di Prussia. Libretto. Portuguese & Italian - LOC's Public Domain Archive Public Domain Search
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King Frederick's II Tower (Torre di re Federico II) and Royal Cathedral (Real Duomo) in the medieval town of Erice - Sicily, Italy Stock Photo - Alamy
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Federico II di Svevia: biografia, pensiero politico e caratteristiche dello Stupor Mundi | Studenti.it
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