The Bauhaus school, founded in 1919 in Weimar Germany, established principles that remain foundational to design over a century later: form follows function, truth to materials, and the integration of art and technology. This article traces Bauhaus influence from architecture and furniture through graphic design to modern digital interfaces. It examines how Bauhaus ideas about grid systems, typography, color theory, and functional aesthetics directly inform today's design systems, and argues that the Bauhaus vision of design as a democratic, accessible practice is more relevant than ever.