Ceilândia is an administrative region in the Federal District in Brazil. It is bordered by Brazlândia to the north, Taguatinga to the east, and Samambaia and Sol Nascente/Por do Sol to the south. With about 398,374 inhabitants, it is the administrative region of largest population in the Federal District. Ceilândia was created on 1971 by Hélio Prates da Silveira, originally created as the "CEI" (Portuguese: Campanha de Erradicação de Invasões) in 1969, a campaign to combat irregular settlements near Brasília.