一般指適合私人敬拜使用的祈禱室或小禮拜堂，不適用於教會的禮拜儀式。羅馬天主教所指的「私人禮拜堂」則特指教區教堂之外的半公共結構物，乃教會為提供特定團體祈禱及慶祝彌撒而設，對象通常為工會或宗教社群，且面積通常較小，不過有時也可能較小禮拜堂稍大。「私人禮拜堂」可位於鄉村或城市中，出入口可獨立或和其他建築共用，其用途和舉行的儀式次數皆須依據教會規定。「私人禮拜堂」的出入限制屬半私人性質，地位介於只要是信徒就有權利進入的教堂與通常僅所有權者才有權利進入的小禮拜堂之間。此結構物可能起源於早期建於殉教士墓上的小禮拜堂，供信眾聚集於此祈禱之用。對於僅有教區總教堂所在城市可設立教堂的時代而言，私人禮拜堂的成立可滿足鄉村居民對於祈禱場地的需求。

祈禱室(羅馬天主教)　(P,,U,繁體中文-偏好,D,,)
小禮拜堂(祈禱室)　(,U,繁體中文-非偏好,UF,,)
私人禮拜堂(祈禱室)　(,U,繁體中文-非偏好,UF,,)
ch'i tao shih (P,,U,韋氏拼音-偏好,UF,U,U)
qǐ dǎo shì (P,,U,漢語拼音-偏好,UF,U,U)
qi dao shi (P,,U,漢語拼音(無聲調)-偏好,UF,U,U)
oratories(P,,U,英文-偏好,D,U,PN)
oratory(,U,英文-非偏好,AD,U,SN)
oratoriums(P,,U,荷蘭語-偏好,D,U,U)
oratorium(,U,荷蘭語-非偏好,AD,U,U)
oratorios(P,,U,西班牙語-偏好,D,U,PN)
oratorio(,U,西班牙語-非偏好,AD,U,SN)

藝術與建築詞典根目錄
....物件層面
........組件 (層級名)
............成分
................<依特定背景區分之組件>
....................<建築劃分>
........................<房間與空間>
............................<依建築種類區分之房間與空間>
................................<宗教建築空間>
....................................<基督教建築空間>
........................................小禮拜堂 (房間或建築物)
............................................祈禱室 (羅馬天主教)

meaning/usage overlaps with....	私人禮拜堂(私人專用空間)
distinguished from....	堂區教堂

英文....	Generally, may refer to prayer rooms or small chapels suitable for private devotions, but not used for services. In a more specific sense in the Roman Catholic Church, an oratory is a semi-public structure other than a parish church, set aside by ecclesiastical authority for prayer and the celebration of Mass for the benefit of a group of persons, such as a guild or religious community; it is usually relatively small in size, but may be larger than a chapel. It may be located in a rural or urban environment; it may be free-standing or entered via another building. The usage and number of services are defined by canon law. Entry to an oratory is semi-private: it is more private than a church, which everyone of that faith has a right to enter, but it is more public than a chapel, which only the owners of the chapel typically have the right to enter. Oratories seem to have originated from the chapels erected over the tombs of the early martyrs where the faithful gathered to pray, combined with the necessity of having a place of worship for the people in rural districts at a time when churches proper were restricted to cathedral cities.
荷蘭語....	Privé-bidkapellen.
西班牙語....	Úsese para pequeñas capillas destinadas para devoción privada, pero no usada para servicios.

祈禱室(羅馬天主教)............	[AS-Academia Sinica]
.................	智慧藏百科全書網 November 14, 2012
.................	世界建築經典圖鑑 336
小禮拜堂(祈禱室)............	[AS-Academia Sinica]
.................	智慧藏百科全書網 November 14, 2012
私人禮拜堂(祈禱室)............	[AS-Academia Sinica]
.................	大英百科全書線上繁體中文版 November 14, 2012
oratories............	[VP]
.................	Dictionary of Architecture and Construction (1975)
.................	CDMARC Subjects: LCSH (1988-)
.................	RIBA, Architectural Keywords (1982)
.................	RILA, Subject Headings (1975-1990)
.................	Webster's Third New International Dictionary (1961)
.................	Avery Index (1963-)
oratory............	[VP]
.................	Getty Vocabulary Program rules
oratoriums............	[Bureau AAT]
.................	AAT-Ned (1994-)
oratorium............	[Bureau AAT]
.................	AAT-Ned (1994-)
oratorios............	[CDBP-DIBAM]
.................	Comité, Plural del término en singular
oratorio............	[CDBP-DIBAM]
.................	Paniagua, Vocabulario Básico de Arquitectura (1998) 237
.................	Toman, El Barroco. Arquitectura, escultura, pintura (1997) 485
Subject:............	[Bureau AAT]
.................	RIBA, Architectural Keywords (1982) Chapels: private
.................	Haslinghuis, Woordenboek bouwkundige termen (1986)

Getty AAT: 300007459 Getty AAT: http://www.getty.edu/vow/AATFullDisplay?find=costume&logic=AND¬e=&subjectid=300007459
聯合目錄： 祈禱室 、小禮拜堂 、私人禮拜堂 、ch'i tao shih 、qǐ dǎo shì 、qi dao shi 、oratories 、oratory 、oratoriums 、oratorium 、oratorios 、oratorio