In the 19th century, Africa became a patchwork of European colonies. Although colonies like Liberia and Sierra Leone were founded by American and British abolitionists as homelands for freed slaves, colonies were mainly set up to exploit the natural resources of the African continent. The primary reason for European colonization of Africa was capitalism. European nations saw opportunity for new trade routes and potential wealth in some of Africa's natural resources.
The most detailed Roman mosaics use small stones to achieve an effect like brushstrokes. Especially in the eastern provinces of the Roman empire, artists “painted” with stone. Hope this helped :)
