The domus excavated in Luni near the Southern City Gate ('Porta Marina') features prestigious decorative and planimetric peculiarities and - at the end of the entrance corridor- the mosaic with navalia depicting merchant ships most likely alludes to the profitable activities of its dominus. This domus was built around 70-50 BC and its location, apparently on the periphery, provides further data regarding the urban planning of Luni in relation to the other prestigious private buildings. In the late 1st century AD the domus with Navalia was occupied by the construction of a small temple surrounded by a portico. We will focus on the daily life of this domus in comparison with the other contemporary domus of Luni, combining all the available sources, and paying particular attention to its final phase and to the new activities carried out in this area.