I suppose the concept was a resprisal of his role from the Herzog film, but Kinski refused to cut his long locks (and then proceeded to get violent with some of the actresses). I'm simply paraphrasing form IMDB here, but I'd believe it if Kinski's legendary bad behaviour is to be believed (and it is).
The other title for this film is Vampire in Venice. I gotta check this out.
From One 7 Movies.
Prince Of The Night
Label: One 7 Movies
Prebook: 08/12/2014 Streets: 09/09/2014
SRP: 19.95 UPC: 812592015238 Cat: 17M023
Not Rated Run Time: 93 Minutes
In Italian and English Color Widescreen 1.77:1
Dolby Digital Mono Region 0
Production year: 1988
Director: Augusto Caminito
Stars: Klaus Kinski, Christopher Plummer, Donald Pleasence, Barbara De Rossi, Yorgo Voyagis
Helietta Canins (Barbara De Rossi) requests the help and knowledge of professor Paris Catalano (Christopher Plummer) to help her to get rid of all the rumors still surrounding her luxurious venetian mansion. According to the legend, Helietta's grandmother has been abducted by the mighty Nosferatu himself (Klaus Kinski). But when Professor Catalano discovers in the basement of Helietta's palazzo the vampire's crypt, he realizes that there could be some terrible truth to all rumors about the existence of an unholy undead in Venice.