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In Roman urban planning, a decumanus was an east–west-oriented road in a Roman city or castrum (military camp).[1] The main decumanus of a particular city was the decumanus maximus, or most often simply "the decumanus".[2] In the rectangular street grid of the typical Roman city plan, the decumanus was crossed by the perpendicular cardo, a north–south street.
In a military camp, the decumanus connected the Porta Praetoria (closest to the enemy) to the Porta Decumana (away from the enemy).[3][4]
In the center – called groma – of a city or castrum, the decumanus maximus crossed the perpendicular cardo maximus, the primary north–south road. The forum was normally located close to this intersection.
- ^ John E. Stambaugh (1 May 1988). The Ancient Roman City. JHU Press. pp. 283–. ISBN 978-0-8018-3692-3.
- ^ The City Walls of Pompeii: Perceptions and Expressions of a Monumental Boundary by Ivo van der Graaff, M.A. Dissertation. Graduate School of The University of Texas, p. 90
- ^ Christoph F. Konrad (2004). Augusto Augurio: Rerum Humanarum Et Divinarum Commentationes in Honorem Jerzy Linderski. Franz Steiner Verlag. pp. 126–. ISBN 978-3-515-08578-6.
- ^ Alan Kaiser (14 October 2011). Roman Urban Street Networks: Streets and the Organization of Space in Four Cities. Taylor & Francis. pp. 160–. ISBN 978-1-136-76006-8.