Kvilleken is the largest oak in Sweden. It is believed to be 1000 years old, was struck by lightning 600 years ago, and the farmer stored his hand plow in the cleft. I found it by using a book Gästekar och Väckerfuror, by Åke Carlsson. You can find my paper on Sacred Trees of Norway and Sweden on Google. I have been researching traditions specifically related to trees planted on farms.

https://m.visitsmaland.se/en/artikel/254