Peter James and 4 other archaeologist’s challenged the conventional dating of the early iron age in their book ‘Centuries of Darkness’ written in 1992. This is an excerpt from their website,
…in the following year  the famous `House of David’ stela was found at Tel Dan in northern Israel. As well as providing the first historical reference (outside the Bible) to David and his house, bolstering the case for the historicity of Solomon, it is also threatening to force a complete revision of Israelite archaeology. Carefully analyzing its original findspot, Rupert Chapman, Executive Secretary of the Palestine Excavation Fund, has concluded that the stela, which can be historically dated to 825-800BC, must have come from a level conventionally dated to the 10th or even 11th centuries BC. If Chapman is right, the dating of Israelite stratigaphy will have to be reduced by as much as two centuries.
taken from here