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On the sign:
[Portrait of Clement Mary Hofbauer] DER HEILIGE CLEMENS MARIA HOFBAUER PRIESTER DER CONGREGATION D. ALLERH. ERLÖSERS DER APOSTEL WIENS WIRKTE IN DER KIRCHE UND IM KLOSTER DER EHRWÜRDIGEN URSULINEN VON 1813 BIS ZU SEINEM TODE 1820
The tablet mentions the Rev. Clement Mary Hofbauer who in his last years lived in Vienna. During Napoleons attacks on Vienna, he worked in a hospital and supported many wounded.
The sign was placed in 1910 when the figure of Hofbauer was made by the sculptor Franz Seifert.
The sign is in the Order House of the Holy Ursula Brotherhood where the priest operated and was photographed that day Click for a larger image
Translation of the text on the sign: The Saint Clemens Maria Hofbauer Priest Of The Congregation D. Allerh. Redeemer The Apostle Of Vienna Worked in the Church and the Convent of the Venerable Ursulines From 1813 until his death in 1820