If someone insisted on referring to Istanbul as Constantinople, I'd hardly be justified in correcting their post as a moderator.
That is the city's rightful name, and 564 years of Turkish occupation cannot change that.
Istanbul was Constantinople
Now it's Istanbul, not Constantinople
Been a long time gone, Constantinople
Now it's Turkish delight on a moonlit night
Every gal in Constantinople
Lives in Istanbul, not Constantinople
So if you've a date in Constantinople
She'll be waiting in Istanbul
Even old New York was once New Amsterdam
Why they changed it I can't say
People just liked it better that way