[https://edition.cnn.com/style/article/piet-mondrian-painting-upside-down-trnd/index.html](https://edition.cnn.com/style/article/piet-mondrian-painting-upside-down-trnd/index.html) >New research suggests that one of Piet Mondrian's iconic Modernist paintings may have been hanging upside down for decade, though the artwork isn't going to be turned right-side up any time soon."