FORUM TIBERII is placed by Ptolemy (Ptol. 2.9) among the Helvetii. It is unknown where it is. D'Anville guesses Kaiserstuhlon the Rhine, chiefly because of the meaning of the German name; which is very unsatisfactory. Haller guesses Zurzachon the Rhine, where there are Roman walls. Another guesses Steckbornon the Lake of Constanz. (Ukert, Gallien.)
[G.L]