Scandinavian capital with many sauna rafts (4)

I believe the answer is:

oslo

(Other definitions for oslo that I've seen before include "Northern capital of Czechoslovakia?" , "European capital in go-slow" , "Nordic city" , "Norwegian city, formerly Kristiania" , "Capital city, called Kristiania until 1924" .)

I've seen this clue in the USA Today.

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