It has been a while since I last studied this in the Old Testament but didn't Solomon build the temple from plans God gave David?
the temple, yes. but this is David's royal palace, built by hiram, king of tyre.
You are correct, but this article discusses David's palace, not the temple built by Solomon.
An excellent observation, except for the fact that this article was about the PALACE that David built rather than the temple that Solomon built.