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Piri Reis Map of Two Islands Santorini and Thera in the Aegean Sea North of Crete Walters WA Full Page. This folio from Walters manuscript contains map of two islands Santorini Santurun and Thera Thira in the Aegean Sea north of Crete late th century AH th centuryearly th century AH th century Ottoman ink and pigments on laid