The classical street layout separates the city into blocks (insulae), defined by the intersection of the east–west (cardi) and north–south (decumani) streets.
Hence Insula II – Insula VII run counterclockwise from Insula II.
To the east are two additional blocks: Orientalis I (oI) and Orientalis II (oII).
To the south of Orientalis I (oI) lies one additional group of buildings known as the "Suburban District" (SD).
Individual buildings having their own entrance number.
For example, the House of the Deer is labelled (Ins IV, 3).

The Forum, temples, theatre, numerous houses and necropolises are still buried in Herculaneum.

The town was surrounded by walls of thickness from 2 to 3 metres and built mainly with large pebbles, dating to the second century BC, while along the coast they were in opus reticulatum.
As in Pompeii, the walls lost their defensive function after the social wars and were incorporated into buildings in their vicinity, for example the House of the Inn.

A single main drain was found, along cardo III, which collected water from the Forum and from house impluviums, latrines and kitchens that overlooked this street, while other drains emptied directly into the street, except those of the latrines that were equipped with a cess pit.
For water supply the city was directly connected to the Serino aqueduct, built in the Augustan age, which brought water to houses through a series of lead pipes under the roads, regulated by valves; previously, wells had been used which found water at a depth of between eight and ten metres.
The classical street layout separates the city into blocks (insulae), defined by the intersection of the east–west (cardi) and north–south (decumani) streets. Hence Insula II – Insula VII run counterclockwise from Insula II. To the east are two additional blocks: Orientalis I (oI) and Orientalis II (oII). To the south of Orientalis I (oI) lies one additional group of buildings known as the "Suburban District" (SD). Individual buildings having their own entrance number. For example, the House of the Deer is labelled (Ins IV, 3).
The Forum, temples, theatre, numerous houses and necropolises are still buried in Herculaneum.
The town was surrounded by walls of thickness from 2 to 3 metres and built mainly with large pebbles, dating to the second century BC, while along the coast they were in opus reticulatum. As in Pompeii, the walls lost their defensive function after the social wars and were incorporated into buildings in their vicinity, for example the House of the Inn.
A single main drain was found, along cardo III, which collected water from the Forum and from house impluviums, latrines and kitchens that overlooked this street, while other drains emptied directly into the street, except those of the latrines that were equipped with a cess pit. For water supply the city was directly connected to the Serino aqueduct, built in the Augustan age, which brought water to houses through a series of lead pipes under the roads, regulated by valves; previously, wells had been used which found water at a depth of between eight and ten metres.
Herculaneum