Complex sentence: Niranam diocese, although is the smallest diocese of the Jacobite Syriac Christian Church (Malankara Archdiocese of Universal Syriac Orthodox Church), it is is historically one of the oldest dioceses of the church.
Split into simpler sentences: Niranam diocese, is the smallest diocese of the Jacobite Syriac Christian Church. It is also historically one of the oldest dioceses of the church.