http://artispress.letras.ulisboa.pt/index.php/artispress/catalog/view/11/5/19-1

 This book is a narrative of the turbulent, historical, cultural and artistic context of the Goan Oratorian architectural tradition, adapted to the temporal and spiritual needs of the native Catholic population of Sri Lanka, during the 18th and 19th centuries, through various form of Indo-Portuguese influences. While analysing the growth and the current situation of the "Oratorian Church Models", which is unique to Sri Lanka, the passages trace the historical background of the Portuguese missionary church architecture from which it emerged. The book also looks at the diversity of architectural traditions of the Oratorians (formally known as Congregation of the Oratory of St. Philip Neri) in other Portuguese territories around the world.