Lux perpetua (Ceaseless Light) is a historical novel with fantasy elements, written by Andrzej Sapkowski. It is the last part of the trilogy. Its events take place in Bohemia, Silesia and Poland, during the time of Hussite Wars. Its action takes place from 1429 until the Battle of Lipany (fall of the Taborites). The title comes from the Latin requiem mass, "Requiem æternam dona eis, Domine, et lux perpetua luceat eis." The Trilogy includes: