Through migration, diaspora members have lost their material relationship to the territory of origin, but they can still preserve their cultural or spiritual relationship through memory. Territory or, more precisely, territoriality – in the sense of adapting oneself to a place in the host country – continues to play an essential role. Memory preserves part of territoriality, whilst the trauma of uprooting creates conditions of mobilisation that can play a substantial role in integrating and unifying various family, religious or community sub-networks into a real diaspora. The construction of commemorative monuments, sanctuaries, monasteries and other symbolic (and sometimes functional) places is an essential means, for the members of a diaspora, of a re-rooting in the host country.