This year does not only mark the 100th anniversary of Karl May's death -- it also marks the 50th anniversary of the first Karl May movies, starring Pierre Brice as Winnetou and Lex Barker as Old Shatterhand.
The first movie in the series was Der Schatz im Silbersee -- The Treasure of Silver Lake -- which came out in 1962. It was shot on various locations in Croatia and starred Herbert Lom as the villainous Cornell Brinkley as well as Brice and Barker.
Here's the trailer in English:
Various events are taking place to celebrate the half-century and there is a web site devoted to the anniversary. Events include a Golden Jubilee celebration in Croatia June 5-9, with Pierre Brice in attendance.