Final answer:
Archaeological findings and biblical sources provide evidence for the existence of the united monarchy of Israel, including the mention of the 'house of David' in the Tel Dan stele and archaeological evidence of King Solomon's building projects.
Step-by-step explanation:
Archaeological findings and biblical sources provide evidence for the existence of the united monarchy of Israel. The Tel Dan stele, discovered in the Golan Heights, mentions the 'house of David,' supporting the existence of King David. Additionally, archaeological evidence has been found for some of King Solomon's building projects, such as ancient gates discovered in sites like Gezer, Hazor, and Megiddo.