In Isaiah 22:22, the prophet refers to the key of the house of David, and in Revelation 3:7, Christ declares Himself as He who has the key of David. This key relates to the history of David's throne, which became central to Israel's monarchy after the transition from a theocracy. God replaced Saul with David, of the tribe of Judah, who ruled over Judah from Hebron for seven and a half years before being anointed king over all Israel, as recorded in II Samuel 5:3. David established Jerusalem as the capital of the Kingdom of Israel and ruled over all the tribes. In II Samuel 7:5-9, 11-16, God, through the prophet Nathan, promises David an everlasting throne, ultimately to be occupied by Christ, the Shiloh of Genesis 49:10, who is of David's lineage. This knowledge of David's throne is identified as the key of David, serving as a vital criterion for identifying the whereabouts and identity of Israel.

The promise of David's throne is central to understanding the lineage of the Messiah. In Jeremiah 33:17, it is declared that David shall never lack a man to sit on the throne of the house of Israel. This assurance does not specify that David's heirs, particularly the Messiah, must trace their roots through Solomon. Therefore, the genealogy in Luke 3, which likely represents Jesus' biological lineage through Mary, holds as valid a claim to David's throne as the one in Matthew 1. In fact, it strengthens His claim, as He can trace His lineage to David through two separate lines. There is no stigma or disqualification in Solomon's name being absent from the list in Luke, as David's name remains the vital one in messianic terms.

The concept of David's Throne is central to the enduring promise of a perpetual monarchy as declared by God. With the fall of Jerusalem and the death of King Zedekiah and his sons, the Davidic monarchy faced a critical juncture. However, God ensured its continuity through a remarkable union. One of Zedekiah's daughters, a descendant of Perez, married an Irish prince from the line of Zerah, both sharing Judah as a common ancestor. This marriage healed the ancient breach within Judah's family, uniting the separate monarchies of Perez and Zerah. Jeremiah, tasked by God with a significant mission, was instrumental in preserving this royal lineage. Commissioned to root out, pull down, destroy, and overthrow, as well as to build and plant, Jeremiah escorted the royal couple—Zedekiah's daughter and the Irish prince—to Ireland via Spain around 569 BC. This ensured that David's throne did not become defunct but remained intact, awaiting Christ's return. God's promise, as reiterated in Jeremiah 33:17, that David shall never lack a man to sit on the throne of the house of Israel, was upheld through this transplantation. Further, the throne of David underwent multiple overthrows as prophesied in Ezekiel 21:27. Initially overthrown in Judah, it was transplanted to Ireland. Subsequently, it was overthrown again, moving from Ireland to Scotland, and finally a third time to England with the ascension of James VI of Scotland as James I in AD 1603. The Davidic throne now resides in England, where it shall remain until He comes whose right it is, as foretold. This throne, ultimately God's and Christ's, stands as a testament to the enduring fidelity of Divine promise, poised for its ultimate fulfillment at Christ's return.