Druids are a major division of indigenous religion and are found in the British Isles and Scotland. Druids are most commonly associated with the indigenous Celtic people of Ireland. Druids are known to have existed as early as the 3rd century BC (History of Britain: the rise and fall of the Druids). Druids passed down rituals and history through stories rather than written texts, so much is still unknown about how they lived. There are still many people in today's culture who actively practice Druidry. Today, Druidry is divided into two sects, Cultural Druidry or Religious Druidry. Cultural Druids are classified by their descendants who are Druids. Typically these people follow the practices of Druidism lightly, but most practice a second, broader religion such as Christianity. Religious druids are classified as active practitioners of the druidic religion. Most religious Druids also have ancestors who were Druids (BA Robinson). Druids were known to be highly intelligent and were often an elite group. They were often the priests of the Celtic religion. The Druids have no official sacred texts, although there are books on astronomy believed to have been written and used by the Druids. The Druids believed that mistletoe and oak trees were very sacred. Pliny, a Roman author, stated that “The Druids (as they call their sages) have nothing in greater veneration than mistletoe and the tree on which it grows, so much so that it is an oak.” (Pliny, section 95). A unique feature of the Druid religion was that they made no distinction between male and female rulers. In chapter 30 of the Annals, a book of Roman history, Tacitus describes the Romans' first encounters with the Druids. He describes women as “running in the middle of the paper…tthews, John. The Summer Solstice: Celebrating the Sun's Journey from May Day to Harvest. Wheaton, Illinois: Quest Books, 2002. Print.Partington, Charles Frederick. The British encyclopedia of literature, history, geography, law and politics. London: Orr and Smith, 1836. Print. Robinson, B. A. . "Celtic Druidry: History, Beliefs, Practices, Myths, and Neopagan Revival." Celtic druidism. Ontario Advisors on Religious Tolerance, April 24, 2010. Web. May 27, 2014. .Tacitus, Cornelius, and Arthur Murphy. The works of Cornelius Tacitus. London: Printed for G.GJ and J. Robinson, 1793. Print. Williams, John and Abergavenny manuscripts. Barddas, or, a collection of original documents: illustrative of the theology, wisdom and uses of the Bardo-Druidic system of the Isle of Great Britain. Llandovery: DJ Roderic, 1862. Print.