"the brown Lenbach portraits"
Portrait of Otto von Bismarck (c.1889)
Public DomainPortrait of Otto von Bismarck (c.1889) - Credit: Franz von Lenbach

 Franz von Lenbach (1836-1904) was a German artist. He is particularly well-known for his portraits of famous people of his period, including Otto von Bismarck and Johann Strauss II.

Self-portrait (c.1900)
Public DomainSelf-portrait (c.1900) - Credit: Franz von Lenbach