Rome: view from St. Pieter.
Just discovered the tool "Autostitch". Woowh!
I tested it on the above panorama, which I never succeeded in making properly with my previous tools, including manual work.
This tool did it in a few minutes, The sky is pretty well straight. The lighting is homogeneous. The stitches seem pretty perfect.
I am very much impressed with this tool. At the moment of this writing, it is still available for free in a temporary demo version.