Complex sentence: St. Mary's Cathedral, Manarcaud under Malankara Jacobite Syrian Orthodox Church is believed to be the first church who reestablished the lent in a wide manner and It is the largest church where the 8-Day lent is popular tradition.
Split into simpler sentences: St. Mary's Cathedral, Manarcaud, under the jurisdiction of the Malankara Jacobite Syrian Orthodox Church, is believed to be the first church to have reestablished the lent in a wide manner. It remains the largest church where the 8-Day lent is a popular tradition.