Immigration usually results in ethnicisation. Yet the correlated external factors make explicit an internal dynamic that characterizes the targeted positions. This internal dynamic is objective. It relies upon the control of mobility related to the land owning that, as a whole, gets into touch with political mediations covered by the State. The case of the Montréal Portuguese neighbourhood shows that it is ethnically pointed out for its inhabitants carried there some cultural traits formerly acquired inside Azores Islands. Moreover, to say the least, such an ethnical outlook transforms investments of cultural values into the Montréal urban position that has been, from the very beginning, politically controlled by many Canadian authorized institutions.