Excavations inside the House of the IV Style in September 2008 were undertaken in order to study the bidental discovered in 1938. The main aim was to define the organisation of the deposit and the sequence in which the remains of the house hit by lightening were buried in a pit dug in the garden. The archaeological documentation aimed to complete the description of the ritual burial of a lightening bolt ( fulgur conditum ) known from the ancient sources, who however describe little of the religious procedure, content of the ritual or of the religious structure comparable to a sacred space.

Above all the excavation of the pit in the House of the IV style provided an opportunity to compare literary and archaeological data in order to improve knowledge of the ritual treatment of a natural phenomenon which generated the constitution of a particular type of religious space, the bidental or puteal of the Roman period.