Domed Tower - the common problem and solution

[JAVOHIR_KAMOLOV]

First, I faced the same problem that everyone had in the forum. I could not merge vertices of the dome and cylinder. It kept saying no vertices has been removed. It appears I added cylinder in object mode, therefore, could not merge the vertices of two separate object. I found the solution here.
Now, I know that,

1. If it is the case, ctrl + J command makes two separate objects one object. Then merge by distance works.

2. Alternatively, adding all the objects in edit mode works perfect as well.
   

   

[NP5]

Well worked out.

You can’t merge verts unless they are in the same object. Like not being able to shake hands unless in the same room.

[JAVOHIR_KAMOLOV]

Thank you. A great analogy. I understand this concept better now