They base their calculations on ancient cuneiform documents that provide details about Nebuchadnezzar II and his successors.Many of these documents were written by men who lived during or close to the time of Jerusalem’s destruction.
وقد دوَّن معظمها كتبة عاصروا دمار اورشليم او عاشوا في حقبة ليست ببعيدة عنه .‏