The union was founded in 1914, when the Roman Catholic Municipal Workers' Union, "St Paulus", was reconstituted as the Dutch Roman Catholic Bond of Government Staff, also known as "St Paul".
In 1964, it joined the Dutch Catholic Trade Union Federation (NKV), at which time, it had 36,803 members.
[3] The NKV formed a federation with the Dutch Confederation of Trade Unions (NVV) in 1975.
[1] By 1980, the union had 45,708 members, of whom, 33% worked in administration, 23% in communications, 22% in health, 9% in utilities, and the remainder in a variety of sectors.
In 1982, it merged with the former NVV-affiliate the General Union of Civil Servants, to establish Abvakabo.