Noun
registry office (plural registry offices)
(informal) Synonym of register office (“office for registering births, marriages and deaths”)
Beatty and Ethel married on 22 May 1901 at the registry office, St. George's, Hanover Square, London with no family attending. Source: Internet
This same edict required priests to register births, marriages, and deaths, and to establish a registry office in every parish. Source: Internet