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What is 1,000-year-old Viking graffiti doing in this Istanbul landmark?
CNN anchor Erica Hill visits the Hagia Sophia Grand Mosque, one of Istanbul’s most visited attractions, to dig into a surprising story that’
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What is 1,000-year-old Viking graffiti doing in this Istanbul landmark? is one of our current travel picks. CNN anchor Erica Hill visits the Hagia Sophia Grand Mosque, one of Istanbul’s most visited attractions, to dig into a surprising story that’.