Insula (Roman city)

See also: History of urban planning

Reconstructed plan of Colonia Claudia Ara Agrippinensium (Cologne), Germany

File:Calleva Atrebatum plan.png

Plan of Silchester

The Latin word insula (literally meaning "island", plural insulae) was used in Roman cities to mean either a city block in a city plan, i.e. a building area surrounded by four streets, or, later, a type of apartment building that occupied such a city block specifically in Rome and nearby Ostia. The latter type of Insulae were known to be prone to fire and rife with disease.

A standard Roman city plan was based on a grid of orthogonal (laid out on right angles) streets. It was founded on ancient Greek city models, described by Hippodamus. It was used especially when new cities were established, e.g. in Roman coloniae.

The streets of each city were designated the decumani (east–west-oriented) and cardines (north–south). The principal streets, the Decumanus Maximus and Cardo Maximus, intersected at or close to the forum, around which the most important public buildings were sited.

Sources and further reading

• The Insula IX Excavation: http://www.reading.ac.uk/silchester/town-life/insula_ix.php
• Pompeii Insula 9: http://donovanimages.co.nz/proxima-veritati/insula-9/index.html