Jerusalem - the whole city, not merely the temple. As it has been the center of the Hebrew theocracy, so it shall be the point of attraction to the whole earth (Isa 2:2-4; Zec 2:10, Zec 2:11; Zec 14:16-21).
throne of ... Lord - The Shekinah, the symbol of God’s peculiar nearness to Israel (Deu 4:7) shall be surpassed by the antitype, God’s own throne in Jerusalem (Psa 2:6, Psa 2:8; Eze 34:23, Eze 34:24; Zec 2:5).
imagination - rather, as Margin, “the obstinacy” or stubbornness.