Claim: Diocesan Metropolitans H.G. Zachariah Mar Dionysius has served for 18 years in Madras Orthodox Diocese (1979 to 1997) while the other two  Diocesan Metropolitans didn't last for 13 years.
Evidence: 1979 1997 H.G. Zachariah Mar Dionysius 1997 2009 H.G. Dr. Yakob Mar Irenaios 2009 Present H.G. Dr. Yuhanon Mar Dioscoros