Viennaâ€™s Leopold Museum has been loaned a painting Two Children on the BeachÂ by Norwegian artist Edvard Munch. However, the workâ€™s authorship has been questioned after scholars including Gerd Woll (a Norwegian collector who compiled a Munch catalogue raisonnÃ© in 2009) saw that the picture no longer had its label â€œattributedâ€ to Munch. The owner, HÃ¥kon Mehren, removed the label as he believes there is no doubt of its authenticity. The situation, brings to mind the question: what evidence and how much of it makes a painting a work by Munch? Well, Mehren has dismissed the fact there is no documentation such as provenance or exhibition history connecting this painting to Munch and has instead relied singularly on technical analysis by the Doerner Institute in Munich.