Gatianus of Tours was a third-century bishop who served as the first leader of the Christian community in Tours. Sent from Rome by Pope Fabian around 250 AD, he was one of seven bishops designated to evangelize the region of Gaul. During his fifty-year ministry, he worked to establish the local church despite significant challenges. He is recognized as one of the seven apostles of Gaul and is venerated as a saint in the Catholic tradition.