Regio

Regio (pl. regiones) is the Latin word for ‘region’ and the Italian word for ‘royal’

It may refer to:


 * Regiopolis, a concept for urban centers in between metropolitan areas.

Ancient toponymy

 * Regiones of Augustan Italy, the departments in which Roman Emperor Augustus divided Italy.
 * 14 regions of the Augustan Rome, in ancient Rome as a name for quartiers of the city of Rome
 * 14 regions of Medieval Rome, resulting from the redivision of the Rome after the revolution of 1143
 * Regio, in ancient Constantinople as a name for the 14 quarters of the city of Constantinople, defined in analogy with those of Rome
 * Regio Aromatica, name for the Horn of Africa
 * Regiones, administrative subdivisions of the kingdoms of Anglo-Saxon England

Astronomy

 * Regio (astronomy), which, in planetary geology, is a large area of a planet or moon that is strongly differentiated in colour or albedo
 * A regio of Venus:
 * Alpha Regio
 * Asteria Regio
 * Beta Regio
 * Ovda Regio
 * A regio of Pluto:
 * Belton Regio
 * Lowell Regio
 * Tombaugh Regio
 * A regio of Titan:
 * Tui Regio
 * A regio of Ganymede:
 * Galileo Regio
 * A regio on Phoebe:
 * Leto Regio
 * A regio on Iapetus:
 * Cassini Regio