Dublin, Co. Dublin - Ireland
Cast iron bollards on O'Connell street.
Their use and provenance are not clearly known, but they were part of a suite of urban furniture introduced to the street roughly around the 1870s.
Some of them (maybe these...) were used to protect William Smith O'Brien statue at the entrance to D'Olier Street.
You can see holes on a couple of them, probably because they were also used as decoractive venting point of a gas or sewer main.