Département Missionaire in Lausanne, Switzerland (DM-échange et mission) is a consortium of Protestant missionary organizations, chief among them Mission Suisse en Afrique du Sud, founded in 1875. The archive in Lausanne has important collections of materials from southern Africa, covering the period from 1875 until the 1970s. DM-échange et mission continues to be active in that region. The photographs available in IMPA are predominantly from Mozambique and South Africa.