The Classification of Built Heritage in Portugal include various heritage sites classified as National, Municipal, and Public Interest.
The Classification of Built Heritage in Portugal corresponds to a group or independent Portuguese archeological civic, military and religious cultural properties deemed to be of sufficient historical value by the Direcao-Geral do Patrimonio Cultural for protection and conservation. The classification of properties of cultural heritage resulted from legislation instituted between 2001 and 2009, and includes: those properties can be classified in several categories (Monumento, Group or Site), as defined by international law; those properties can be classified in terms of the national, public or municipal public interest. A property is considered of national interest when its protection or appreciation, in total or in part, represents a significant cultural value to the nation. A property is considered of public interest when its national protection or appreciation represent a cultural value of national importance, but for which the protection regime inherent in being of national interest may be disproportionate. A property of municipal interest is considered to be possessions whose protection and appreciation, in whole or in part, represent a cultural value of predominant meaning for a given municipality. 
