whence Cardinal Howard takes his title. It was erected in the fourth
century on the site where the martyrdom of the above saints took
place, by Pammachus, the friend of S. Jerome. They were officers of
Constantine's household, and were put to death by Julian. The medieval
portico is formed by eight marble and granite pillars. The aisles are
formed by sixteen ancient columns; the pavement is of _opus
Alexandrinum_; the stone surrounded by a railing is said to be that on
which the martyrs suffered death. The outside of the medieval apse is
rare.
_To the left of the church, and beneath the adjoining Passionist
Convent_ (_ring at the door on the right_), are the remains of some
solid unfinished stone arches, supposed to be