By examining megalithic architecture and hypogea in North Africa, a number of cultural interactions can be traced, enabling the researcher to grasp the funerary landscape’s process of evolution. When it comes to megalithic architecture, one needs to distinguish between different types of monuments. Some are of indigenous origin and have undergone local evolution, while others are the result of successive contacts with Mediterranean megalithic architecture. Saharan influences in their turn have marked several burial sites and megalithic regions in Tunisia and eastern Algeria. Architecture, rituals and ceramics may reinforce certain features of these diverse cultural contacts and interactions. As for the hypogea, a type of monument known as haouanet in Tunisia and eastern Algeria, they are mainly concentrated in areas along the Tunisian coastline and coastal islands, Cap Bon, north-west Tunisia and eastern Algeria. The latter region represents an extension of the burial cluster in north-west Tunisia. Several regions, including the Tunisian Sahel, have been in contact with the Mediterranean islands since prehistoric times, and the archaeological record continues to grow. The Haouanet are simply the result of these successive contacts. This paper will focus not only on the distinction, but also on the interaction between an evolving local culture and another Mediterranean one, which intervenes with other architectural styles. In spite of the chronological gaps that are lacking in many necropolises, protohistoric and historic architecture, which requires even more investigation, makes it possible to develop this approach.