Otto I of Nassau (German: Otto I. von Nassau; born in 1224[1] and died between 3 May 1289 and 19 March 1290)[2][3] was Count of Nassau and is the ancestor of the Ottonian branch of the House of Nassau.
Protecting and enforcing his rights in his country was not always easy for Otto, especially at a time when the power of the supreme patron in the empire had sunk deeply. Disputes with the lords of Westerburg and the counts of Sayn about prerogatives in the Westerwald, and with the lords of Greifenstein and the lords of Dernbach about executive powers, often led to feuds and struggles. The details of the course of these feuds are unknown.[6] In his struggles with the Archbishop of Trier, Otto lost the Vogtei of Koblenz and of Ems.
Otto's attempt to reduce his father's rich gifts to the Teutonic Order, or at least not to increase them in accordance with the wishes of the Order, ensured that he was designated as a robber of the goods of the order in 1285, was excommunicated, and his county was put under interdict, until the dispute was settled the following year.[6]
Otto founded the chapel in Feldbach before 1287.[13]ʻOttho comes de Nassawen … cum uxore nostra Agnete nec non Henrico nostro primogenitoʼ confirmed the donation of ʻbonorum in Hasilbach et Aldindorphʼ to the church in Aldenburg (read: Altenberg Abbey) made by ʻmatrem nostram Methildim comitissam bone mem … cum sorore nostra Katherina ibidem locataʼ by charter dated 3 May 1289. This is the last mention of Otto, in a charter dated 19 March 1290, he is mentioned as deceased.[3] He was buried in Altenberg Abbey.[3][14] He was succeeded by his sons Henry, Emicho and John.
^Before 1224, the counts of Nassau had transferred half of the city of Siegen to the Archdiocese of Cologne. See: Huberty, et al. (1981).
^In 1342, Henry I of Nassau-Siegen owned the total Herborner Mark. See: Huberty, et al. (1981).
^The Kalenberger Zent was an area located between the Oberlahn, the Dill and Wetzlar and included the areas Mengerskirchen, Nenderoth and Beilstein. See: Huberty, et al. (1981).
^Castle and Amt Nassau bore the name Dreiherrische because until 1778 it was jointly owned by the Ottonian branch and two sub-branches of the Walramian branch (Nassau-Usingen and Nassau-Weilburg). See: Huberty, et al. (1981).
^The Ämter of Miehlen and Schönau remained jointly owned until 1303, after which they were transferred to the Walramian branch and both sub-branches owned them jointly until 1778. See: Huberty, et al. (1981).
^The Vierherrengericht was named after its four owners, the counts of Katzenelnbogen (Hessen), Diez (Nassau-Diez), Nassau-Usingen and Nassau-Weilburg. In 1774 these areas, around the city of Nastätten and composed of thirty-eight villages, were divided. See: Huberty, et al. (1981).
^A wedding date is not mentioned anywhere. According to Dek (1970), the eldest son from the marriage was born around 1270, so the marriage must have taken place before 1270.
Sources
Ausfeld, Eduard (1887). "Otto I., Graf von Nassau" [Otto I, Count of Nassau]. Allgemeine Deutsche Biographie [Universal German Biography] (in German). Vol. Band 24. Leipzig: Duncker & Humblot. p. 707.
Becker, E. (1983) [1950]. Schloss und Stadt Dillenburg. Ein Gang durch ihre Geschichte in Mittelalter und Neuzeit. Zur Gedenkfeier aus Anlaß der Verleihung der Stadtrechte am 20. September 1344 herausgegeben [Castle and City Dillenburg. A Journey through their History in Medieval and Modern Times. Published to celebrate the grant of Town Privileges on 20 September 1344] (in German) (2nd ed.). Dillenburg: Der Magistrat der Stadt Dillenburg.
Dek, A.W.E. (1970). Genealogie van het Vorstenhuis Nassau [Genealogy of the Royal House of Nassau] (in Dutch). Zaltbommel: Europese Bibliotheek. OCLC27365371.
Huberty, Michel; Giraud, Alain; Magdelaine, F. & B. (1981). l'Allemagne Dynastique. Tome III Brunswick-Nassau-Schwarzbourg [German Dynasties. Volume III Brunswick-Nassau-Schwarzburg] (in French). Le Perreux: Alain Giraud.
Lück, Alfred (1981) [1967]. Siegerland und Nederland [Siegerland and The Netherlands] (in German) (2nd ed.). Siegen: Siegerländer Heimatverein e.V.
Vorsterman van Oyen, A.A. (1882). Het vorstenhuis Oranje-Nassau. Van de vroegste tijden tot heden [The Royal House of Orange-Nassau. From the earliest days until the present] (in Dutch). Leiden & Utrecht: A.W. Sijthoff & J.L. Beijers.