Arnold zum Turm
Arnold zum Turm  (de turri or of the tower, died c. 1266) was city chancellor to the bishop of Mainz from 1238 until at least 15 October 1263 – his son Eberhard took over that office in 1266 and so Arnold is believed to have died that year. 

He is also notable as the co-founder (with Arnold Walpold) of the Rhine City League and as such is commemorated in the Walhalla temple.

Sources 
 Walhalla, Amtlicher Führer (Official guidebook), 2006

13th-century births
1266 deaths