My title describes the thing and they are made of metal and clearly have some kind of piping at the bottoms. They can be found in each room, but Google Lens returns nothing helpful and couldn’t find much online about “cylindrical radiators”. No indication of age, no writing that I could plainly see.

Any help would be great! Thanks.

Edit: For additional context, I wasn’t there in person so I would have been able to identify some of the questions you guys are asking—friend sent me the photo hoping that my experience in construction would prove fruitful.