The Old Mission Church, as well as Joubert House and the KWV Building Complex that comprise the Montagu Museum, form an integral part of the architectural heritage of Montagu and Long Street in particular.
Since the establishment of the museum in the Old Mission Church in 1975, this building has housed the administrative offices and historical research centre. A collection of pulpit Bibles and church artifacts including old wedding dresses form the focal point of the church with its original pulpit, pulpit cloth and wall text painted by Mr Nico Adriaan van Tuhra. Other important permanent exhibitions are the Indigenous Medicinal Plant research project displayed in one wing and the T.O. Honiball collection of cartoons.
Frequently changing temporary exhibitions form a showcase for the large and diverse museum collection.
In 2005 Montagu Museum celebrated it 30th anniversary by publishing “Montagu and its People”: 30 Stories by Heinie Heydenrych and launching the book at a fashion parade of 30 wedding dresses of yesteryear. The undoubted highlight was the beautiful museum collection of wedding gowns designed and made by Angelique Albertyn, permanent dressmaker of Brink Bros, Montagu.
In 2007 the old Mission Church celebrated its 100th anniversary.The archive which adjoins the church is an important research centre which contains a comprehensive collection of historical documents and photos relating to Montagu the district and people as well as the museum library.