'Throne of God' in the Bible

Therefore are they before the throne of God; and they serve him day and night in his temple: and he that sitteth on the throne shall spread his tabernacle over them.

And he showed me a river of water of life, bright as crystal, proceeding out of the throne of God and of the Lamb,

And there shall be no curse any more: and the throne of God and of the Lamb shall be therein: and his servants shall serve him;