'The Lord's throne' signifies, in general, the whole heaven, and specifically, the spiritual heaven, and by extension, divine truth proceeding, and so, everything of heaven and the church.

In Genesis 41:40, this signifies things that are natural. (Arcana Coelestia 5313)

In Exodus 11:5, this signifies the falsified truths of faith that have wrongly receive attention. (Arcana Coelestia 7779)

'The throne built by Solomon,' as mentioned in 1 Kings 10:18-20, signifies both royalty and judgment.

In Isaiah 66:1, this signifies celestial and spiritual things which when they relate to the Divine are like natural things to man's spiritual and celestial. (Arcana Coelestia 2162[8])

In Matthew 25:31, this signifies judgment. (Arcana Coelestia 4809[3])

In Revelation 1:4, this signifies the universal heaven. 'Throne' signifies heaven and judgment.

'Throne,' as in Revelation 4:2, signifies a representation of judgment, because the things which John saw were representative visions. He saw them as he described them, but they were forms representative of things to come.

In Revelation 8:2, this signifies the church regarding doctrine.

'Throne,' as in Revelation 12:5, signifies the angelic heaven.

'Throne' also signifies the government of falsity and evil in Revelation 2:13, 8:2, Daniel 7:9, Haggai 2:22, and Isaiah 14:13.

(References: Apocalypse Explained 8 [2], 289)