Pipe identification needed

Pipe at base of chimney/fireplace in utility area of the basement. No visible gas assembly in fire box.

What would you say about this pipe in basement floor. Seems it lacks a purpose.

202712 B 041 (Small).JPG

Call it an unidentified piece of uncapped iron pipe sticking out of the basement floor. Purpose is undetermined. Recommend inquiring of current owner as to history / purpose.