sentences:  A total of 21 catacombs have so far been discovered in the Beit She'arim necropolis, almost all containing a main hall with recesses in the wall ("loculi") and sarcophagi that once contained the remains of the dead.These have since been removed, either by grave-robbers, or by "Atra Kadisha", the governmental body responsible for the reburial of exhumed bones at archaeological sites.Most of the remains date from the 2nd to 4th century CE.