archaeological
The Tel Dan Stele
First extra-biblical reference to the 'House of David'.

Scripture Reference: 1 Kings 12
"And the king of Israel rose up..."
The Evidence
Skeptics doubted King David existed, calling him a folklore hero like King Arthur.
Historical Context
In 1993, the Tel Dan Stele was found. It is a victory stone from an enemy king (likely Hazael) boasting of defeating the 'King of Israel' and the 'House of David'.