The term pōmērium is a classical contraction of the Latin phrase post moerium (lit.
He states that it was an Etruscan tradition to consecrate this area by augury and that it was technically unlawful to inhabit or to farm the area of the pomerium, which in part had the purpose of preventing buildings from being erected close to the wall (although he writes that, in his time, houses were in fact built against the wall on the line).
The legendary date of its demarcation, 21 April, continued to be celebrated as the anniversary of the city's founding.
[4] The pomerium did not follow the line of the Servian walls, and remained unchanged until the dictator Lucius Cornelius Sulla, in a demonstration of his absolute power, expanded it in 80 BC.
[5] The latest pomerial stone from the reign of Claudius was discovered on 17 June 2021 in the vicinity of the Mausoleum of Augustus.