Rotating non-centered meshes

Questions
1

Hi, i load gltf modela and it’s meshes are not in center. I want to rotate model relative to another position than center. In addition, the model has animations and is in a different position in each, so I want to rotate the model around its new position.

I tried to rotate each mesh separately, but it caused the model to break down.
I also can’t rotate the camera due to other activities in the project.
Can anyone help solve the problem?

2

There are many examples here in this recent thread.
Positioning an object around a circle looking at the center - Questions - three.js forum (threejs.org)
My contributions focus on putting objects into a group, and then rotating the group.