Scholars dispute whether the roots of terrorism date back to the 1st century and the Sicarii Zealots, to the 11th century and the Hashshashin, to the 19th century and the Fenian Brotherhood and Narodnaya Volya, or to other eras. The Sicarii and the Hashshashin are described below, while the Fenian Brotherhood and Narodnaya Volya are discussed in the 19th Century sub-section. Other pre-Reign of Terror historical events sometimes associated with terrorism include the Gunpowder Plot, an attempt to destroy the English Parliament in 1605.