Curia travel guide

A Curia in early Roman times was a subdivision of the people, i.e. more or less a tribe, and with a metonymy it came to mean also the meeting place where the tribe discussed its affairs. Etymologically it is derived from the Old Latin term "co-viria," literally an "association of men." This archaic pronunciation - note that in Classical Latin "v" is always pronounced as "w" - eventually evolved into the more recognizable word.
The curia per antonomasia was the Curia Hostilia in Rome, which was the building where the Senate usually met. The Senate, initially just a meeting of the city elders from all tribes (its name comes from "senex", which means "old man"), saw its powers grow together with the conquest that brought a town of humble origins to rule a large Republic (and then decrease steadily with the advent of the Empire).
During their expansion, the Romans exported the model to every city that gained the status of Municipium, so that it had its own Senate and its own officials charged with local administration (although they weren't usually elected but nominated by the central government; the only place where officials were actually elected by the people was Rome itself, and by Imperial times even those elections, although kept for the sake of tradition, had no more significance). Senators themselves were not elected since the early Republic, having been transformed into a hereditary nobility.
By the Imperial period, a curia was any building where local government held office, i.e. judicial proceedings, government meetings, bureaucracy, etc., and shortly afterwards the term started to refer also to the people making up the local administration (see curiales). (...) more....