Although small when compared to the catacombs of St. Paul and St. Agatha in Rabat, they are an important record of the sizeable community that must have lived in the area in around the last half of the first millennium AD.

The catacombs open on to a low ridge facing a now lost Roman harbour, making the small site archaeologically important.

The most impressive hypogeum is adorned with two decorated pillars, an agape table and two baldacchino tombs, rarely found outside the catacombs of Rabat.

At least two of the window tombs are lavishly decorated with reliefs depicting palm fronds and other spiraled patterns.

The palm fronds, together with a number of incised crosses, are proof of the Christian origins of the burial site.