Lately I've seen several posts related to Kaliningrad (the Russian exclave nestled between Lithuania and Poland). Each time, at least one person in the comments contributes something like "Also known as Königsberg". The place was renamed 80 years ago. I don't see people doing that for any other formerly Prussian location that had a Prussian name that differed from the name assigned to it now. (At least, I don't think so; do posts about Gdansk commonly have responses reading "Also known as Danzig"?) Posts about Sri Lanka and Thailand and Beijing don't routinely have comments reminding us that they used to be called "Ceylon" or "Siam" or "Peking". What is it about Kaliningrad that triggers this?