ELI5: Explain Like I'm 5

Viipuri

Viipuri is a city in Finland that used to be part of Russia a long time ago. People have lived in Viipuri for a very long time, since even before there were cars or big buildings. Viipuri is famous for its beautiful old castle, which is made of big stones and was used to protect the city from bad people a long time ago. The castle has lots of big walls and towers that people can climb up and look out from to see the whole city. Nowadays, Viipuri is a modern city with lots of people, cars, and tall buildings, but it still has lots of old and pretty parts, like the castle and some other buildings with funny-looking roofs.
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