Moses and Joshua in the Tabernacle.
James Jacques Joseph Tissot, circa 1896-1902.
The Lord Himself makes several mentions of the throne of Israel. One example is included here. This passage does not refer to Solomon, but is included as an example of the nomenclature used to denote the throne of Israel in other text. Notice that the Lord refers to the king's seat as "the throne of David."
Jeremiah 29:16 For thus saith the Lord concerning the king that sitteth upon the throne of David, and concerning all the people that dwell in this city, your brethren that are not gone forth with you into captivity; 17 thus saith the Lord of hosts: Behold, I will send upon them the sword, the famine, and the pestilence, and will make them like vile figs, that cannot be eaten, they are so bad. (JPS) (Emphasis added)