 The Catacombs were reopened in 1969 by the Archbishop of Naples and modern excavations started in 1971.The types of tombs include loculi, arcosoli, pits dug in the ground, and less often, sarcophagi made of tuff, or recycled marble and stone from older graves.The loculi are aligned vertically and the most simple style of burial found in the catacombs but not indicative of the status of the deceased.