This paper deals with the seismic response evaluation of the Totem tower of Diar Es Saada, which is one of the taller unreinforced masonry (URM) building in Algeria with twenty floors and 62 m in height. The tower located in Algiers, a town exposed to important earthquakes, has survived so far without major damage or alteration. This high-rise building was designed by the French architect Fernand Pouillon in 1953 without considering regulations for earthquake-resistant construction. It was built in only fifty days by adopting an original structural system and an innovative construction processes developed by this architect: URM stone and brick load-bearing walls with reinforced concrete floors. The study carried out consists of a multidisciplinary approach. First, a detailed diagnosis was performed on site to assess the state of conservation of the building. Then, the seismic behaviour was modelled and analyzed by using both linear dynamic and non-linear static analysis in SAP2000 and TreMuri software. With regard to the current Algerian seismic design regulation, the results obtained in terms of time period, frequency, storey drifts and displacements showed that the tower can be considered as an earthquake-resistant building fulfilling the required structural safety conditions. In this respect, the Totem tower of Diar Es Saada deserves to be classified as a national heritage and its satisfactory overall structural behaviour confirms that the architect Pouillon has also excellent skills in engineering construction.