オットー・フォン・ハプスブルク
The villa also was used by Emperor Charles I of Austria and Empress Zita. Their son, Otto von Habsburg (1912 – 2011) was born in Villa Wartholz. His baptism and first Communion were received in the chapel, which was located in the villa. On 17 August 1917, Otto von Habsburg held a ceremony where he handed over the Military Order of Maria Theresa to 24 officers, among them Kövess, Dankl, Arz, Johann Haas von Haagenfels, Wenzel von Wurm, Cavallar and Banfield.