The ancient Queen Luna was married to King Sol. Following their deaths, people worshipped them as gods. Both the sun (Solis) and moon (Luna) have been named after them.

The most common depiction of these two alchemical figures is an odd painting showing a castle with four towers displaying a dragon emblazoned on one wall with a black toad. Within the castle is an alchemical bath, and from this rises a pillar which supports an astonishing structure in the form of a castle with seven towers which is once more an alchemical bath. King Sol and Queen Luna are bathing within it.

SOURCE(S): Zork Nemesis (design documents)