It amazes me how influential some artist from the early 1900's have an impact on todays work from fashion to architecture. My favorite and first come to mind is Piet Mondrian's work and his contribution to create 'De Stijl' .
My favorite is the infamous Yves Saint Laurent 'Mondrian' Day dress,structured and balanced so well.
And my least favorite would probably have to be the Mondrian Nike Sb' Dunks.