The Pompeii folk believed that the earthquake of 62 d.c was a symbol like cholera sent from the Gods against their city (they didn’t have any idea what the Gods had in store for them in 79 d.c!) and as a sign of their love and let’s say it, a big thank you to the Gods, they built this sanctuary. Not actually having finished this job (evidently the families of the city didn’t appreciate the slow progress of the work) at the moment when Vesuvius erupted, the sacred place was not at all stable and was completely open, it didn’t have any retaining walls and so the obvious happened… it fell down, the only thing that was found intact was the altar. Some openings were also found that would have housed future statues.