This master thesis consists of an architectural study aiming to provide detailed information about the “1930 building”. This study will serve as a basis for the elaboration of a reconversion proposal supporting the reintegration of this abandoned building into its context in an improved and functional way. The “1930 building” is part of the historical complex BIP located near Place Royale and dates back from the thirties as its name suggests. Its implantation in this zone of the city, characterised by a varied topography, generate numerous constraints. Indeed, due to this significant altitude difference, the surrounding buildings have a strong impact on the "1930 building", giving the feeling that it is lost among them.