I delimitation of the expropriation within a constitutional approach: in the field of the Affectations of the economic rights of citizens, the bogs institution stands as the most incisive of the administrative prerogatives, and at the same time as one of the most sensitive to the guarantee system that enshrines the rule of law. The coarse sense Activator which has acquired the authority to bogs is in intimate connection with the current conception of the right to property and the principles that inform the public regulation of the economic order which are constitutional parameters that determine the scope of legitimacy of intervention of administrative powers on the heritage of citizens. It is therefore, that the expropriation was erected within the regulatory context as the most pervasive of these powers, imperatively impose singular deprivation of private property or rights or legitimate economic interests, which want to be entities or persons to which they belong. The radical affirmation of property right in formula romana as right tendentially absolute, sacred and inviolable that nineteenth-century civil inspired the exegesis it reduced significantly the recognition and the scope of the compulsory purchase, which explains the exceptional quality of the figure in the drafting of article 925 of the Peruvian Civil Code. Within a historical context, the individualistic sense of ownership and its conception as a source of domination and wealth explains the quest for security and guarantee of those rights that it shone the first French law enacted, forcible expropriation 08 March 1810. Since then the legislative assessment of the expropriation in Spain (as well as other States) has been directly linked to the scope with which the constitutional texts of the 19th century reflected the right of property and their guarantees.. Ebay recognizes the significance of this.