It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
Auguste Renoir Dance at Le Moulin de la Galette Muse d'Orsay RF derivative work AutoContrast edit in LCH space. Artwork Creator PierreAuguste Renoir This is derivative work based on the Google Art Project image here see Gallery below The file has been reduced in size and the image lightened in LCH space colour space designed
Page 2017 Free-images.com. All images are Public Domain