Turning type in a rectangle to a circle (pic attached)

[Arr-L]

How is the below example achieved?

I'm assuming that the type would of been laid out normally within a rectangle and its interior lines, which would help the designer get the positioning and its balance right before then turning it into a circle. My question would be how is the linear composition then turned into a circle?

[Ton Frederiks]

Try making it as a Pattern Brush.

[jdanek]

I would create each section on its own circle, perhaps by using the original circle and applying offset path to achieve the circumference needed.  Or dupe circles.  Not sure I would attempt a rectangle first.

[Ton Frederiks · Accepted solution]

Maybe an Artbrush (instead of a Pattern brush) is a better solution: