THE ARCHAEOLOGY OF IRON-AGE JERUSALEM: Dutch archaeologist Margreet Steiner has an essay on the Bible and Interpretation website:

Jerusalem in the 10th / 9th centuries BC
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What has been found from the 10th (or 9th) century BC... are remains of public buildings and fortifications only. Jerusalem was only a small town then, maybe 12 hectares large, and it harbored certainly no more than 2000 inhabitants. Maybe the Queen of Sheba would still have enjoyed her visit to Jerusalem, but I doubt that she would have been greatly impressed.

Or � another possibility � the town of Jerusalem was founded in the beginning of the 9th century BC, and Solomon and David had nothing to do with it.