Domed Tower.blend (630.2 KB)
This is the domed tower I came up with and merged vertices!
Please upload render image or screen snapshot!
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No problem. Most people, will not download files.
Only occasionally, when there are strange problems.
Your dome is good!
No faces inside … ? 
Yes, I deleted that face so that it was one object and open from bottom to top on the inside 
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It’s not a problem for blender. But we want to have clean meshes.