Complex sentence: Through Morris's company, the ideals of the Pre-Raphaelite Brotherhood influenced many interior designers and architects, arousing interest in medieval designs and other crafts leading to the Arts and Crafts movement headed by William Morris.
Split into simpler sentences: Through Morris's company the ideals of the Pre-Raphaelite Brotherhood influenced many interior designers and architects, arousing interest in medieval designs, as well as other crafts. This led directly to the Arts and Crafts movement headed by William Morris.