He remained active as an actor till to the old age.
His works at the theater led him to different cities within Europe. Among others he was engaged at theaters in Bucharest Berlin, Leipzig, Vienna Hamburg, Moscow, Dresden and Lodz.
The actor Adolf Klein learned his acting abilities at the conservatory in Vienna before he made his stage debut in Baden near Vienna in 1865.
Besides his activity as an actor he also took over the management of the Deutsches Theater in Lodz.
Adolf Klein was married with the actress Jenny Frauenthal.