Which class was marx's powerful?

Marx believed that eventually classes of people would disappear and the ultimate communist society would be one with no social classes. In the capitalist society he saw two classes. The bourgeoisie at the top who owned and controlled the means of production and the proletariat at the bottom who were that common workers owning nothing but the right to sell their labor. He believed the proletariat would eventually take over from the bourgeoisie and society would become one with no social classes.