Xenophon is primarily remembered for his suspected involvement and collaboration in the murder of Claudius by poison.
[1] Xenophon was born on the island of Kos, where he trained as a physician before voyaging to Rome.
Once there, he began to practice medicine, and as his reputation as a physician grew, Xenophon became very wealthy.
Xenophon remains a suspect in the alleged poisoning of Claudius on 12–13 October (the date is disputed), as he was one of the few people who spent a large part of the day in close contact with the emperor.
[2] If Xenophon was involved, what he actually did to the ailing Claudius in his bedroom remains a source of debate.