Complex sentence: Agrippina is regarded in ancient and modern historical sources as a Roman Matron with a reputation as a great woman, who was an ambitious woman who knew what her goals were and nothing stood in her way of getting to them.
Split into simpler sentences: Agrippina is regarded in ancient and modern historical sources as a Roman Matron with a reputation as a great woman. She was an ambitious woman who knew what her goals were and nothing stood in her way of getting to them.