from the Catholic Encyclopedia
An extraordinary occurrence, mentioned in the oratio of her feast day, took place at her death. Being unable to receive Holy Communion because of constant vomiting, she requested the priest to spread a corporal upon her breast and lay the Host on it. Shortly afterwards the Host disappeared and Juliana expired, and the image of a cross, such as had been on the Host, was found on her breast. Immediately after her death she was honoured as a saint. The Order of Servite Tertiaries was sanctioned by Martin V in 1420. Benedict XIII granted the Servites permission to celebrate the Feast of St. Juliana. Clement XII canonized her in 1737, and extended the celebration of her feast on 19 June to the entire Church. St. Juliana is usually represented in the habit of her order with a Host upon her breast.