It is only with Solomon that great architecture appeared.
It's been awhile since I read Finklestein's book The Bible Unearthed but as I recall Jerusalem at that time was a village. Finklestein didn't report any great architecture being found in those strata. What great architecture are you referring to? And what is your source that dates it to the time of David and Solomon?
Professor Finklestein (Head of the Archeology Department, Tel Aviv University), is an Israeli and has received a lot of criticism in Israel for his work from conservative elements in the society that are aware of what it means for the Biblical underpinnings of Zionism. To read more about the research that lies behind this summary, I refer you to the writings of Israel Finklestein. The most accessible book is "The Bible Unearthed: Archaeology's New Vision of Ancient Israel and the Origin of Its Sacred Texts" written with Neil Asher Silberman and published by The Free Press in 2001.
http://www.rense.com/general18/bible.htm
Finklestein is convinced that the House of David did exist. David and Solomon were probably tribal chiefs in the hill country that became the Kingdom of Judah Jerusalem was the Capital of Judah not of Israel. In the time of David and Solomon, Jerusalem was an unimportant very small town with no great Temple. The major cult centers were farther to the north in the cities of Israel. In fact the great cities of Canaan that were previously attributed to the Solomon were built by Israeli Kings like Ahab.
http://www.rense.com/general18/bible.htm
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