The Pergamon Altar in Berlin. 1901-02. 6 collodion paper prints, mounted to board. Each between 18,7 x 27,8 cm and 22,8 x 27,8 cm or reverse (mounts between 21,3 x 30,3 cm and 25,6 x 31,4 cm or reverse). With the photographer's logo, name and negative number in the negative in lower right or left corner.