A Bengali-language write-up of Archbishop Patrick D'Rozario, CSC, of Dhaka, Bangladesh, giving the background and characteristics of this Vatican II document, summary of the document touching on the mystery of the Catholic Church, people of God (bishops, priests, the Religious, and laity), Church's priestly structure (bishops, priests and deacons), the laity and their dignity and duty, the universal call to holiness in the Church, the Religious (priests, Brothers, and Sisters who take vows of celibacy, obedience and poverty), and, finally, the pilgrim Church of this world and its goal for afterlife.