Rhea Silvia, the mother of Romulus, was a vestal virgin, who lived in the kingdom of Latium about four hundred years after the death of Æneas. A vestal virgin was a sort of priestess, who was required, like the nuns of modern times, to live in seclusion from the rest of the world, and devote their time wholly and without reserve to the services of religion. They were, like nuns, especially prohibited from all association and intercourse with men. Æneas himself is said to have founded the order of vestal virgins, and to have instituted the rites and services which were committed to their charge. These rites and services were in honor of Vesta, who was the goddess of Home. The fireside has been, in all ages and countries, the center and the symbol of home, and the worship of Vesta consisted, accordingly, of ceremonies designed to dignify and exalt the fireside in the estimation of the people. Instead of the images and altars which were used in the worship of the other deities, a representation of a _fire-stand_ was made, such as were used in the houses of those days; and upon this sacred stand a fire was kept continually burning, and various rites and ceremonies were performed in connection with it, in honor of the domestic virtues and enjoyments, of which it was the type and symbol. These fire-stands, as used by the ancients, were very different from the fire-places of modern times, which are recesses in chimneys with flues above for the passage of the smoke. The household fires of the ancients were placed in the center of the apartment, on a hearth or supporter called the _focus_. This hearth was made sometimes of stone or brick, and sometimes of bronze. The smoke escaped above, through openings in the roof. This would seem, according to the ideas of the present day, a very comfortless arrangement; but it must be remembered that the climate in those countries was mild, and there was accordingly but little occasion for fire; and then, besides, such were the habits of the people at this period of the world, that not only their pursuits and avocations, but far the greater portion of their pleasures, called them into the open air. Still, the fire-place was, with them as with us, the type and emblem of domestic life; and accordingly, in paying divine honors to Vesta, the goddess of Home, they set up a _focus_, or fire-place, in her temple, instead of an altar, and in the place of sacrifices they simply kept burning upon it a perpetual fire.