Holy Trinity Church is closely associated with the early history of South Australia.
The Revd Charles Howard, first Colonial Chaplain, travelled to South Australia on HMS Buffalo and commenced duties as first Anglican minister. He brought a prefabricated church building funded by the South Australian Church Society, but it was useless. He had to use temporary facilities for some time.
The Society also received the right to a Town Acre from Mr Grenfell. The Trustees they appointed arranged for Col William Light, the colony’s Surveyor General, to choose the location for the church building. Acre No.9 was originally near the main river crossing and beside the main road to the Port.
The foundation stone of the permanent building was laid by Capt John Hindmarsh, South Australia’s first governor on 26 January 1838. It was rebuilt in 1845, and significantly extended in 1888–89, when it was transformed to its existing Victorian Gothic style. Pointed windows were installed, a pitched roof with fine timber trusses replaced the original flat roof, supported by masonry buttresses and higher walls, while the tower was extended to its present height. Twentieth century additions include galleries, the organ loft, and extra vestry space.
The site also includes a Rectory (1851, now offices), a Parish Hall (1887), a smaller hall, offices, cottage (now meeting rooms) and a large car park.
http://www.trinityadelaide.org.au/