Two previously unseen paintings by Claude Monet, 'Iris' and 'Weeping Willow', will be auctioned by Sotheby's in Paris, with estimates reaching up to 30 million euros. The paintings, preserved in remarkable condition, have never been publicly displayed in color and are part of a private collection valued at 40 million euros. This auction coincides with the centenary of Monet's death, further heightening interest in his works.