Lustrum republic. The time when the lustrum took place has been calculated. Six ancient Romulian years, of 304 days each, were, with the difference of two days, equal to five solar years of 365 days each, with one leap year of 366 days; or the six ancient years made 1824 days, while the five solar years contained 1826 days. The lustrum, or the great year of the ancient Romans, was thus a cycle, at the end of which, the beginning of the ancient year nearly coincided with that of the solar year. As the coincidence, however, was not perfect, a month
Lustrum (novel) Lustrum (novel) Lustrum (US: Conspirata; 2009) is a historical novel by British author Robert Harris. It is the sequel to "Imperium" and the middle volume of a trilogy about the life of Cicero (106–43 BC). For its 2010 release in the United States, and Italy, it was retitled "Conspirata". The book continues in the format of the first novel, with the story told in the first-person from the point of view of Cicero's secretary Tiro. It follows on immediately from "Imperium", starting with the beginning of Cicero's consulship and ending with his exile as a result of the enmity of