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The formal classification of heritage and historic structures in Canada will fall under guidelines laid out by the Federal Heritage Buildings Review Office (FHBRO) AND through an equivalent provincial heritage conservation authority.
Here are some general boundaries identified by FHBRO:
Here are further qualifiers for federally designated buildings from the FHBRO 'Heritage Evaluation'...
The heritage character of federal buildings is evaluated on the basis of the following factors:
Historical associations - thematic association, person/event and local development
Architecture - aesthetic design, functional design, craftsmanship and materials, designer
Environment - site, setting and landmark status.