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:
Renoir PierreAuguste The Two Sisters On the Terrace uncorrected. Artwork de Auf der Terrasse en On the Terrasse fr Sur la terrasse oil canvas cm Art Institute of Chicago en This version has been converted from to JPEG format but has not been colorcorrected and has been left uncropped to show the color card HermitageTorrent Creator
Page 2017 Free-images.com. All images are Public Domain