* Didirikan sebagai '''Prefektur Apostolik Brunei Darussalam''' pada 21 November 1997, memisahkan diri dari [[Keuskupan Miri|Keuskupan Miri-Brunei]]
* Ditingkatkan menjadi '''Vikariat Apostolik Brunei Darussalam''' pada 20 Oktober 2004
Pada mulanya, The present Catholic community in the country finds its roots in the ministry of the [[[[Misionaris Santo Yosef dari Mill Hill|Missionary Society of St. Joseph]]. The origins of the Roman Catholic population of Brunei is traced to the influence of the [[Spanish people|Spanish]] missionaries coming mainly from neighbouring [[Philippines]], who also converted the [[Kadazans]] in [[Sabah]]. Throughout the years, the local Church was administered by various ecclesiastical jurisdictions centred in [[Labuan Territory|Labuan]], [[Jesselton]] (now [[Kota Kinabalu]]), [[Kuching]] and [[Miri, Malaysia|Miri]], cities in neighbouring [[Malaysia]].
The separation of Bruneian territory formerly under the ''Diocese of Miri-Brunei'' (now simply known as the [[Diocese of Miri]]) created a distinct Bruneian Church. This separated territory was designated as an [[apostolic prefecture]] in November 1997, to be headed by then Msgr. [[Cornelius Sim]] (who was the [[Vicar General]] of Miri-Brunei, and a Bruneian priest) as its first ''apostolic prefect''. On 22 February 1998, the ''Apostolic Prefecture of Brunei Darussalam'' came into being with the proclamation of the [[papal bull]] to the faithful and the installation of the apostolic prefect. On 20 October 2004, less than seven years after it was formed, the apostolic prefecture was elevated to an [[apostolic vicariate]]. However, it remained a [[suffragan]] of [[Roman Catholic Archdiocese of Kuching|Archdiocese of Kuching]]. Msgr. Sim was appointed the first apostolic vicar, carrying the dignity of a [[titular bishop]]: his episcopal ordination took place in January 2005.
