Marcel Janco (German: [maɐ̯ˈsɛl ˈjaŋko], French: [maʁsɛl ʒɑ̃ko], common rendition of the Romanian name Marcel Hermann Iancu pronounced [marˈt͡ʃel ˈherman ˈjaŋku], last name also Ianco, Janko or Jancu; May 24, 1895 – April 21, 1984) was a Romanian and Israeli visual artist, architect and art theorist. He was the co-inventor of Dadaism and a leading exponent of Constructivism in Eastern Europe. In the 1910s, he co-edited, with Ion Vinea and Tristan Tzara, the Romanian art magazine Simbolul.