With Louis's death in 1227, his brother Henry Raspe assumed the regency due to the minority of four-year-old Hermann.[1] Henry managed to officially succeed his brother after the death of Elizabeth in 1231. Hermann never reigned and died ten years later; some historians have accused Henry of poisoning the youth. He was married to Helen, daughter of Otto I, Duke of Brunswick-Lüneburg.
References
^ a bKlaniczay 2002, p. 211.
Bibliography
Klaniczay, Gábor (2002). Holy Rulers and Blessed Princesses: Dynastic Cults in Medieval Central Europe. Translated by Palmai, Eva. Cambridge University Press.
Mägdefrau, Werner (2010). Thüringen im Mittelalter 1130-1310 Von den Ludowingern zu den Wettinern. Jena: Rockstuhl. ISBN 978-3-86777-152-8.
Warsitzka, Wilfried (2002). Die Thüringer Landgrafen. Dr. Bussert & Stadeler. ISBN 978-3932906220.
Knochenhauer, Theodor (1871). Geschichte Thüringens Zur Zeit Des Ersten Landgrafenhauses (1039–1247). Gotha.{{cite book}}: CS1 maint: location missing publisher (link)
Galletti, Johann Georg A. (1784). Geschichte Thüringens.
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