Some variants of Aramaic are also retained as sacred languages by certain religious communities. Most notable among them is Classical Syriac, the liturgical language of Syriac Christianity. It is used by several communities, including the Assyrian Church of the East, the Ancient Church of the East, the Chaldean Catholic Church, the Syriac Orthodox Church, the Syriac Catholic Church, the Maronite Church, and also the Saint Thomas Christian denominations of India. One of Aramaic liturgical dialects was Mandaic, which besides becoming a vernacular (Neo-Mandaic) also remained the liturgical language of Mandaeism. Syriac was also the liturgical language of several now-extinct gnostic faiths, such as Manichaeism.