Aignan of Orleans was a fifth-century bishop who served the city of Orléans in Roman Gaul. Born in Vienne around 358, he initially lived a life of prayer in a hermitage before studying under Bishop Euvertius. After serving as an abbot, he eventually succeeded Euvertius as the seventh bishop of the diocese. He is most famously remembered for his leadership during the siege of Orléans in 451, where he worked to protect the local population from the invading forces of Attila the Hun.