Supayalat, also spelt Suphayalat, was the last queen of Burma who reigned in Mandalay (1878–1885), born to King Mindon Min and Queen of Alenandaw. The British corruption of her name was "Soup Plate". She was married to her half-brother, Thibaw, who became the last king of the Konbaung dynasty in 1878, upon Mindon Min's death. She is best known for engineering a massacre of 80 to 100 royal family members, to prevent potential rivals from usurping Thibaw's power, although she had always denied any knowledge of the plot, which may have been hatched by her mother together with some of the ministers, including the chancellor Kinwon Min Gyi U Kaung.

Mandalay is the second-largest city in Myanmar, after Yangon. Located on the east bank of the Irrawaddy River, 631 km north of Yangon, the city has a population of 1,225,553.