Complex sentence: Marbach was originally significant for its development of the ancestral bloodstock of several warmblood horse breeds, and today continues to produce the Württemberger, it is probably best known as the home stud of the Weil-Marbach Arabians.
Split into simpler sentences: Marbach was originally significant for its development of the ancestral bloodstock of several warmblood horse breeds, and today continues to produce the Württemberger. However, it is probably best known as the home stud of the Weil-Marbach Arabians.