This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Sommer Giorgio n. Gotthardbahn Sisikon. Giorgio Sommer Gotthardbahn Traforo del San Gottardo Sisikon Numero di catalogo Giorgio Sommer Gotthardbahn Sisikon Catalogue Scan Creator Giorgio Sommer Sommer Giorgio Gotthardbahn Sisikon cropped Historical images of Lake Lucerne by Giorgio Sommer Sisikon Historical images