Yup. I have a thing for "cupola"s.
I had a moisture issue inside when it had a gravel floor and I always liked cupolas so I found one on a barn that fell and installed it. Cured the moisture issue immediately. Apparently they are designed to produce a upward draft to dry the hay in the loft. It also dropped the temp inside in the summer huge. I also have one as a lawn ornament, (wife won't let me put it on the house :laughing that doesn't have the added 22 caliber ventilation. That one has the full lightning rod/porcelain ball/weathervane top. Very cool looking. Would love to install the same on top of this one, but people think they are made of gold now.