Mondo Knows Facts

Istanbul has carried three famous names

It was Byzantium, then Constantinople, and became Istanbul officially only in the twentieth century Greek settlers founded Byzantium on the site, and Constantine refounded it as his capital in 330. The name Istanbul comes from a Greek phrase meaning to the city, which people used long before it became official. Turkey asked other countries to use it in 1930. It sits in Mondo's world geography collection, one of 200 facts that each trace back to the reference below.

Where this comes from

Encyclopaedia Britannica

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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Tags: place-names, turkey, cities

Istanbul has carried three famous names: the short answers

Where does this come from, and can I check it?
It was Byzantium, then Constantinople, and became Istanbul officially only in the twentieth century. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a world geography fact?
Yes. It sits on the World Geography shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?
The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.