^Fest. 285 states that the senate was forbidden to meet in this temple due to their decree that the Fabii should go forth to the siege of Veii was made in aede Jani; but this is probably apocryphal, for there is no evidence of an earlier temple of Janus in Rome in which a meeting of the senate could have been held. The structure of Duilius, however, was probably on the site of an earlier shrine (HJ 508; Rosch. II.26; Gilb. I.260‑265; iii.380; Jord. I.2.347).
^Fast. Allif. et Vall. ad XVI Kal. Sept., CIL I2 p217, 240; Fast. Amit. ad XV Kal. Nov., CIL I2 p245, 325, 332
^Serv. Aen. VII.607, which is an interpolation in Jordan's opinion, though this is not warranted by Thilo's apparatus criticus. It is much more likely that a scholar confused this temple with the Janus at the bottom of the Argiletum, and accordingly wrote 'sacrarium hoc, id est belli portas, Numa Pompilius fecit circa imum Argiletum iuxta theatrum Marcelli' (cf. LIV. I.19.2). This is the second of the alternatives suggested by Wissowa in Gött. Gel. Anz. 1904, 562.