===Important cities===*"Alae" (Aalen)*"Arbor Felix" (Arbon)*"Abodiacum" (Epfach)*"Aquilea" (Heidenheim an der Brenz)*"Augusta Vindelicorum" (Augsburg)*"Ausugum" (Borgo Valsugana)*"Bauzanum" or "Pons Drusi" (Bolzano)*"Belunum" (Belluno)*"Bilitio" (Bellinzona)*"Brigantium" (Bregenz)*"Cambodunum" (Kempten im Allgäu)*"Castra Batava" (Passau)*"Castra Regina" (Regensburg)*"Clavenna" (Chiavenna)*"Clunia" (probably Feldkirch or Balzers)*"Curia" (Chur)*"Endidae" (Neumarkt)*"Feltria" (Feltre)*"Foetes" (Füssen)*"Guntia" (Günzburg)*"Gamundia Romana" (Schwäbisch Gmünd)*"Oscela" (Domodossola)*"Parthanum" (Partenkirchen)*"Sebatum" (San Lorenzo di Sebato/St.
Iz imena Retija je nastalo ime pogorja Rätikon.