Presumably, there was real summer activity in Laterns before the Walser came. Romans worked there as woodworkers, hunter or herdsmen which is testified by still Reatoroman field names. The name Laternsertal (Laterns valley) is also Reatoroman as well as Damüls, Fontanella, Raggal, Marul or Galtür. The name appears for the first time in 1177 as “Mons Clauturni”. For many years, it was called the “Tal Gattern” what from today’s name emerged.
The eldest Vorarlberg document about the Walser immigration is from Laterns. On 29 May 1313, Johannes and Wilhelm, native of Valais, received the estate in Glattern as long lease from Lord Rudolf II and Berthold von Montfort.