 The term building, as in outbuilding, can be used to refer to historically and functionally related units, such as a courthouse and a jail, or a barn and a house.Buildings included on the National Register of Historic Places must have all of their basic structural elements as parts of buildings, such as ells and wings; interiors or facades are not independently eligible for the National Register.As such, the whole building is considered during the nomination and its significant features must be identified.