Boniface was the first missionary to call women to his aid. In 748, in response to his appeal, Abbess Tetta sent over to Germany St. Lioba and St. Walburga, with many other nuns. They sailed with fair weather, but before long a terrible storm arose. Hereupon Walburga prayed, kneeling on the deck, and at once the sea became calm. On landing, the sailors proclaimed the miracle they had witnessed, so that Walburga was everywhere received with joy and veneration. There is a tradition in the Church of Antwerp that, on her way to Germany, Walburga made some stay there; and in that city's most ancient church, which now bears the title of St. Walburga, there is pointed out a grotto in which she was wont to pray. This same church, before adopting the Roman Office, was accustomed to celebrate the feast of St. Walburga four times a year. At Mainz she was welcomed by her uncle, St. Boniface, and by her brother, St. Willibald. After living some time under the rule of St. Lioba at Bischofsheim, she was appointed abbess of Heidenheim, and was thus placed near her favourite brother, St. Winibald, who governed an abbey there. After his death she ruled over the monks' monastery as well as her own. Her virtue, sweetness, and prudence, added to the gifts of grace and nature with which she was endowed, as well as the many miracles she wrought, endeared her to all. It was of these nuns that Ozanam wrote: "Silence and humility have veiled the labours of the nuns from the eyes of the world, but history has assigned them their place at the very beginning of German civilization: Providence has placed women at ever cradleside." On 23 Sept., 776, she assisted at the translation of her brother St. Winibald's body by St. Willibald, when it was found that time had left no trace upon the sacred remains. Shortly after this she fell ill, and, having been assisted in her last moments by St. Willibald, she expired.
St. Willibald laid her to rest beside St. Winibald, and many wonders were wrought at both tombs. St. Willibald survived till 786, and after his death devotion to St. Walburga gradually declined, and her tomb was neglected. About 870, Otkar, then Bishop of Eichstadt, determined to restore the church and monastery of Heidenheim, which were falling to ruin. The workmen having desecrated St. Walburga's grave, she one night appeared to the bishop, reproaching and threatening him. This led to the solemn translation of the remains to Eichstadt on 21 Sept. of the same year. They were placed in the Church of Holy Cross, now called St. Walburga's. In 893 Bishop Erchanbold, Otkar's successor, opened the shrine to take out a portion of the relics for Liubula, Abbess of Monheim, and it was then that the body was first discovered to be immersed in a precious oil or dew, which from that day to this (save during a period when Eichstadt was laid under interdict, and when blood was shed in the church by robbers who seriously wounded the bell-ringer) has continued to flow from the sacred remains, especially the breast. This fact has caused St. Walburga to be reckoned among the Elaephori, or oil-yielding saints (see OIL OF SAINTS). Portions of St. Walburga's relics have been taken to Cologne, Antwerp, Furnes, and elsewhere, whilst her oil has been carried to all quarters of the globe.
The various translations of St. Walburga's relics have led to a diversity of feasts in her honour. In the Roman Martyrology she is commemorated on 1 May, her name being linked with St. Asaph's, on which day her chief festival is celebrated in Belgium and Bavaria. In the Benedictine Breviary her feast is assigned to 25 (in leap year 26) Feb. She is represented in the Benedictine habit with a little phial or bottle; as an abbess with a crozier, a crown at her feet, denoting her royal birth; sometimes she is represented in a group with St. Philip and St. James the Less, and St. Sigismund, King of Burgundy, because she is said to have been canonized by Pope Adrian II on 1 May, the festival of these saints. If, however, as some maintain, she was canonized during the episcopate of Erchanbold, not in Otkar's, then it could not have been during the pontificate of Adrian II. The Benedictine community of Eichstadt is flourishing, and the nuns have care of the saint's shrine; that of Heidenheim was ruthlessly expelled in 1538, but the church is now in Catholic hands. Source: Catholic Encyclopedia