I finished a nine-year project of mine this weekend, having visited 49 museums. That’s every museum in urban Stockholm that is currently open, as well as a few that have since closed or that are only open to groups by appointment. Several of the ones that my wife likes I’ve visited multiple times. And I’ve also visited 20 museums in more peripheral locations outside of town. This may sound like a lot, but it’s little more than one new museum every second month on average.
I really recommend this kind of project! You get to see amazing things if you quit going back to the same ten museums year in and year out. Wikipedia has a convenient list for most major cities (here’s the one for Stockholm that I’ve used). Paraphrasing the famous Dr. Jones, you belong in a museum!
Aardvarchaeology - by Dr. Martin Rundkvist 
49+20=69. Where do you get 79?
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Did you sum up the entrance fees? Some tourist cards seem to give discounts or free entry in Stockholm, but Duck didn’t find anything for all Sweden.
Here in Finland we have the Musem Card that costs 74€/year and gives free access to about 350 Finnish museums, and discounts in their shops. But still, for 9 years that would be 666€ (unless inflation interferes).
https://museot.fi/museumcard
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Sorry, no, I don’t know what I’ve paid. Many big museums have been offering free admission in recent years.
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