Leopold III (, 1073 – 15 November 1136), known as Leopold the Good, was the Margrave of Austria from 1095 to his death in 1136. He was a member of the House of Babenberg. He was canonized on 6 January 1485 and became the patron saint of Austria, Lower Austria, Upper Austria and Vienna. His feast day is 15 November. Biography Leopold was born at Babenberg castle in Gars am Kamp, the son of Margrave Leopold II and Ida of Formbach-Ratelnberg. The Babenbergs had come to Austria from Bavaria where the family had risen to prominence in the 10th century. He grew up in the diocese of Passau under the influence of the reformer bishop Altmann of Passau. In 1096, Leopold succeeded his father as margrave of Austria at the age of 23. He married twice. His first wife, who died in 1105, may have been one of the von Perg family. The following year he married Agnes, the widowed sister of Emperor Henry V whom he had supported against her father Henry IV. This connection to the Salians raised the importance of the House of Babenberg, to which important royal rights over the margraviate of Austria were granted. Also, Agnes had influential connections through her previous marriage to Frederick of Hohenstaufen, one of her sons being Conrad III of Germany. Leopold called himself "Princeps Terræ", a reflection of his sense of territorial independence. He was considered a candidate in the election of the Kaiser of the Holy Roman Empire in 1125, but declined this honour. He is mainly remembered for the development of the country and, in particular, the founding of several monasteries. His most important foundation is Klosterneuburg (1108). According to legend, the Virgin Mary appeared to him and led him to a place where he found the veil of his wife Agnes, who had lost it years earlier. He established the Klosterneuburg Monastery there. He subsequently expanded the settlement to become his residence. Leopold also founded the monasteries of Heiligenkreuz, Kleinmariazell and Seitenstetten which developed a territory still largely covered by forest. All of these induced the church to canonize him in 1485. Leopold also fostered the development of cities, such as Klosterneuburg, Vienna and Krems. The last one was granted the right to mint but never attained great importance. The writings of Henry of Melk and Ava of Göttweig, which are the first literary texts from