Concrete form tubes. I'm not sure what lengths they come in, the Lowe's here only carries 4' sections. I taped two of them together to make the columns for my mausoleum.
Last winter I began creating my new upstairs Victorian Bedroom building special furniture , fireplace and some Roman columns almost identicle to the ones pictured!
I used sheet metal furnace pipe for the main shaft with wooden circles cut out of some old 2 inch thick wood, at the top I cut numerous wooden railing spindles and grouped them tightly together at the top.
Since the Victorian age would through numerous ages, patterns and colors/styles all together I decided to also do this so right next to the Roman columns there is a pointy doorway with Egyptian heiroglphics gracing the walls.
Who would be collecting such diverse artifacts?
Maybe a really really old immortal person..who sleeps days?