On the precipice of the cliff monastery, you find your next clue: "Constantinople's cathedral is where it lies." You know Constantinople is now named what?

"Istanbul was Constantinople / Now it's Istanbul, not Constantinople." The catchy song is true. Modern-day Istanbul was once Constantinople, established under Roman Emperor Constantine the Great, although the Vikings called the city, "Miklagård," meaning "the big farm or city". When it was captured by the Ottoman Empire, the city was renamed Istanbul, which became official in 1930.

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