In a context of urban mutation and the emergence of a stingy real estate thought, this thesis deals with the concept of identity where the attitude towards historical buildings reveals a lack of societal awareness.
The research examines a specific case of the European city of Sfax which admits a particular architecture worthy of this specific identity. This specific case which is the building of the Bank of Tunisia (BT) faces a set of issues that puts it at risk of disappearance, and subsequently deteriorate the value of the urban set. This thesis aims to preserve this value through the search for the appropriate intervention strategy, and the optimal function to inject into the building according to its urban context.