Nguyễn Thị Hương (阮氏香), also known as Học phi (學妃; lit.
[1] Following Kiến Phúc's accession to the throne, Hương was elevated to the position of one of the Tam Cung (三宮), three most powerful palace women[note 1] who played a significant role in the enthronement and dethronement of Nguyễn Emperors Kiến Phúc, and Hàm Nghi.
After Emperor Kiến Phúc's unexpected death in 1884, there were spreading rumors of her involvement in the incident.
According to A. Delvaux,[2] Hương had an affair with Nguyễn Văn Tường - a regent that Tự Đức had appointed to guide his successors.
On that same night, Học Phi slipped poison into Kiến Phúc's medicine, resulting in the emperor's death.