How to use array to create circular array without spiralling I am trying to build a Colosseum. I have one arch and want to use an array for the rest. I've added an empty at the center and added the array. Done the object offset, but no matter what I do I keep getting a spiral effect instead of all of the duplicates sitting on the same level.
Create an arch or an object to be repeated.



Create a closed curve (circle) This curve will control the perimeter.



On you object add an Array Modifier with the Fit Curve option and your cicle selected.
Then add a Curve Modifier using the circle again to control it.





Then add another array!



If you add an empty in the middle of the circle and use it as an offset object you can create variations in size and rotation by changing the placement, size and rotation of the empty.