Is this interior (and if so is this 'business side' or intervening wall or floor) or exterior photos (assume exterior porch or eave side - wall to left & emt)? How is the chimney lined/relined?

Edited to add: What is the chimney/chase serving (thimble, stove, fireplace, insert, furnace, boiler, etc.)? Re-route telephone, thermostat, meter display-sending unit cable and avoid staples pinching cable.