Three miraculous events are recorded of his life, all having taken place in the main square of Cadiz. In one, he was able to save the life of a builder who had fallen off a roof, stopping his fall with one hand. On another occasion, a priest passed him while en route to administer the Last Sacraments to a dying person. When the acolyte accompanying the priest pointed out to the friar that he had not removed his hood (the customary form of reverence to the Blessed Sacrament which the priest would be carrying), Didacus told him, "Tell the priest that the ciborium is empty". This turned out to be the case. On yet another occasion, a heavy rainstorm hit the city. The square, where Didacus happened to be preaching at the time, was the only spot on which no rain fell.