The
worldliness that follows close on prosperity undermined the spirit of
faith; the pomp and luxury of the court and the palace were carried into
the forms of worship, into the construction of churches, into the manner
of burial. Social distinctions overcame the brotherhood in Christ.
Riches paved an easy way into the next world, and power set up guards
around it. Imperial remains were not to mingle with common dust, and the
mausoleum of the princess rose above the rock-hewn and narrow grave of
the martyr and saint.

The present descent into the catacombs that lie near the churches of St.
Agnes and St. Constantia is by an entrance in a neighboring field, made,
after the time of persecution, to accommodate those who might desire
to visit the underground chapels and holy graves. A vast labyrinth of
streets spreads in every direction from it. Many chambers have been cut
in the rock at the side of the passages,--some for family burial-places,
some for chapels, some for places of instruction for those not yet fully
entered into the knowledge of the faith. It is one of the most populous
of the subterranean cemeteries, and one of the most interesting,
from the great variety in its examples of underground architectural
construction, and from the number of the paintings that are found upon
its walls. But its peculiar interest is, that it affords at one point a
marked example of the connection of an _arenarium_, or pit from which
_pozzolana_ was extracted, with the streets of the cemetery itself. At
this point, the bed of compact _tufa_, in which the graves are dug,
degenerates into friable and loosely compacted volcanic sand,--and it
was here, very probably, that the cemetery was begun, at a time when
every precaution had to be used by the Christians to prevent the
discovery of their burial-places. No other of the catacombs gives a
clearer exhibition of the differences in construction resulting from
the different objects of excavation. In the Acts known as those of St.
Valentine it is related, that in the time of Claudius many Christians
were condemned to work in certain sand-pits. Under cover of such
opportunities, occasions might be found in which hidden graves could
be formed in the neighboring harder soil. In digging out the sand, the
object was to take out the greatest quantity consistent with
safety, leaving only such supports as were necessary to hold up the
superincumbent earth. There are few regular paths, but wide sp