Stipulations are facts which are agreed to by both sides in order to avoid presenting them at trial and going through unnecessary evidentary hearings on undisputed facts.

Not quite. Stipulations are items that are agreed to by the prosecution and the defense that they will both accept as "fact" for the purposes of the legal proceeding concerned. This doesn't mean that they are necessarily historically accurate, or have been researched and/or documented by historians.Only that the parties have agreed not to dispute them.

Best, Greg