La colline noire 

"La colline noire" is a landscape painting by Roderic O'Conor, a leading figure in the Irish Impressionist movement. This painting, created sometime between 1860 and 1940, captures the rolling hills of the Irish countryside with a delicate yet dramatic touch. O'Conor's masterful use of color and light creates a sense of depth and atmosphere, with the prominent dark hill in the background creating a striking contrast against the vibrant green fields and the expansive blue sky, punctuated by a single billowing cloud. The painting is notable for its unique composition and its ability to evoke a sense of peace and tranquility.