It seems like almost all of Trosas most famous buildings are yellow. That, I have never noticed before, and I have lived in this town almost all my life!
This house is “Societetshuset”. Today it’s empty most of the time. Sometimes though, people have art exhibitions and have party there.
In the former century the house was for the high society from our capitol town, when they arrived to Trosa at weekends. Maybe they had party time all the time 🙂