Building a fire place?

I just purchased a house where i have my main chimney connected downstairs to a heating boiler , i would like to add in the house a open fire place to burn some wood also , now , that is the only chimney in the house and their is no opening currently for it in the living room , can i create a opening and built a free standing fire place , or i need to build a second chimney for the fire place , i don’t see the big problems with creating a hole in the existing one and add on but this is why i am asking , because i don’t want to miss anything , thank you very much for your help .
Alex

to build your own fireplace you will need to lay up a seperate foundation and build your own fireplace complete with firebox and its own chimney…you cannot build a fireplace in your living room and tie it into the existing chimney , if that is what you are asking…

Has anyone tried to convert an inside (air blower type) wood furnace into an outside furnace to heat a home?