Consistorium, rij, n. g. A counsayle house, especially of a prince: sometime the counsayle assembled in such a place.
Lewis and Short: Latin dictionary
consistōrĭum, ii, n. [consisto] (postclass.), a place of assembly. I. In gen., prop. of the earth, as a dwelling-place of man, Tert. Res. Carn. 26.—B.Trop.: consistorium libidinum lupanar, id. ad Uxor. 2, 6; id. Spect. 17.—II. Esp. A.A room where servants wait, Sid. Ep. 2, 2.—But most usually, B.The place where the emperor's council met, the emperor's cabinet, Aus. Grat. Act. 29; Amm. 14, 7, 11; Cod. Th. 6, 10, 2; Inscr. Orell. 3184 al.