See Baronius, (Annal. Eccles. A.D. 628, No. 1 - 4,) Eutychius, (Annal. tom. ii. p. 240 - 248,) Nicephorus, (Brev. p. 15.) The seals of the case had never been broken; and this preservation of the cross is ascribed (under God) to the devotion of Queen Sira.