Saint Thomas Anglicans (often called Anglican Syrian Christians or CSI Syrian Christians) are the Saint Thomas Christian members of the Church of South India; the self-governing South Indian province of the Anglican Communion. They are among the several different ecclesiastical communities that splintered out of the once undivided Saint Thomas Christians; an ancient Christian community whose origins goes back to the first century missionary activities of Saint Thomas the Apostle, in the present-day South Indian state of Kerala. The Apostle, as legend has it, arrived in Malankara (derived from Maliankara near Muziris) in AD 52.