Arsinoë IV (d. 41 BCE) was a Ptolemaic princess who rebelled against her sister Cleopatra VII during the Alexandrian War in 48 BCE. After being defeated by Cleopatra's ally Julius Caesar, she was a captive in his Roman triumph. Arsinoë later became a priestess at the Temple of Artemis at Ephesus until Mark Antony and Cleopatra had her assassinated.
This is a companion discussion topic for the original content at https://www.worldhistory.org/Arsinoe_IV/.