Windows Open Simultaneously 1st Part, 3rd Motif is an oil-on-canvas painting by French painter Robert Delaunay, created in 1912. It is part of the Windows painting series. The current painting, like its predecessor, Simultaneous Windows 2nd Motif, 1st Part, is held at the Solomon R. Guggenheim Museum, in New York. A painting with the same title is held at Tate Modern, in London.