A weapons storage facility, real or metaphoric. (2Kgs 20:13) and (Isa 39:2) describes King Hezekiah showing his armory in Jerusalem to the Babylonian emissaries as part of his psychological warfare. (Neh 3:19) makes incidental reference to a similar, if not the same, facility. (Jer 50:25) metaphorically refers to the Lord’s opening his armory in the conflict against Babylon.