On the morning of August the sixth, 1945, this site lay about 1.2 kilometers from the hypocenter of the atomic bomb. The blast brought down the whole church, apart from the rectory, which had been newly built in 1936. Fire then spread and burned the rectory too. At the time, the parish had about 300 members, and a little over 100 of them lived within the city. Twenty-five are recorded as having died in the bombing. The parish priest then was a German, Father Hugo Lassalle, and he was inside the rectory when the bomb fell. The building withstood the blast and did not collapse. That autumn, he and other priests put up a shack of corrugated tin, roughly the size of three tatami mats, and used it as a chapel. That tiny shelter was the first step toward rebuilding the parish. Out of that experience came an idea. Father Lassalle proposed a church as a place to remember the victims of the atomic bomb, and as a symbol of friendship and peace among all the peoples of the world. Catholics, along with people around the world who sincerely longed for lasting peace, answered with their wishes and generous donations. The cathedral was dedicated on August the sixth, 1954.