What event led to Judas Iscariot's notoriety?

Judas Iscariot is primarily known for his betrayal of Jesus, which is a pivotal event in Christian theology and literature. This act of betrayal is marked by Judas agreeing to betray Jesus to the authorities in exchange for thirty pieces of silver. His notoriety stems from this act, which is viewed as the ultimate act of treachery, leading to Jesus' arrest and crucifixion. The significance of Judas's betrayal is amplified in various texts, where it serves as a cautionary tale about loyalty, greed, and the consequences of betrayal. Other events, such as his presence at the Last Supper or acts like expressing disbelief or doubt, do not carry the same weight in terms of his lasting infamy within religious and literary contexts. Hence, his betrayal is the defining feature of his legacy.