ATRIUM REGIUM
found only in Livy (xxvi. 27;
xxvii. 11 , referring to
the fire of 210 B.C.), and used apparently of the
ATRIUM VESTAE (q.v.).
The origin of this name may be due to the confusion between Atrium
Vestae and
REGIA (q.v.; Van Deman, Atrium Vestae 10).