Otto "Otl" Aicher (German: [ˈɔtl̩ ˈʔaɪçɐ]; 13 May 1922 – 1 September 1991) was a German graphic designer and typographer. Aicher co-founded and taught at the influential Ulm School of Design. He is known for having led the design team of the 1972 Summer Olympics in Munich, and for overseeing the creation of its prominently used system of pictograms. Aicher also developed the Rotis typeface.