Carl Andresen is well known as author and editor of groundbreaking monographs in the field of early church history (Logos und Nomos, 1955; Die Kirchen der alten Christenheit, 1971; Zum Augustin-Gespräch der Gegenwart, i, ii, 1962, 1981; Geschichte des Christentums, i, 1975; and the Handbuch der Dogmen- und Theologiegeschichte, i–iii, 1980–4). His smaller studies are also of great value, some of them having become classics. In 2009, a hundred years after Andresen's birth, Peter Gemeinhardt did us all a great service by publishing fifteen of Andresen's smaller studies in this handy volume, three of them published here for the first time. There were two areas in particular within which Andresen made pioneering contributions. First, on the question of early Christian self-definition, and the contextualisation of early Christianity in the Hellenism of late antiquity, he wrote several seminal contributions that often were ahead of their time. In this collection we find ‘Justin und der mittlere Platonismus’; ‘Bestattung als liturgisches Gestaltungsproblem in der Alten Kirche’; ‘Zur Entstehung und Geschichte des trinitarischen Personbegriffs’; ‘Altchristliche Kritik am Tanz: ein Ausschnitt aus dem Kampf der Alten Kirche gegen heidnische Sitte’; ‘Adaption, Usurpation und Integration der Antike in das spätantike Christentum’; ‘The integration of Platonism into early Christianity’; and ‘Dogmengeschichtliche Aspekte zur religions- und geistesgeschichtlichen Ableitung des frühen Christentums’. Second, Andresen was a leading scholar on Augustine, in this volume exemplified by the articles ‘Gedanken zum philosophischen Bildungshorizont Augustins vor und in Cassaciacum’; ‘Die geoffenbarte Wahrheit und die sich offenbarende Wahrheit oder: das Verhältnis von Wahrheit und Autorität bei Augustin’; and ‘Augustin: das Geheimnis seiner Wirkung’. A third focus in Andresen's scholarship was problems of ecclesiology and church law, here represented by ‘Zum Formular frühchristlicher Gemeindebriefe’, ‘“Ubi tres, ecclesia est, licet laici”: Kirchengeschichtliche Reflexionen zu einem Satz des Montanisten Tertullian’, and ‘Die Bibel im konziliaren, kanonistischen und synodalen Kirchenrecht’. Apart from these studies, the volume also contains interesting contributions in which Andresen reflects on the nature and task of church history as a theological discipline: ‘Zur Dogmengeschichte der Alten Kirche’; ‘Kirchengeschichtsschreibung – eine aktualisierte Selbstrechtfertigung’; and ‘Dogmengeschichtliche Aspekte zur religions- und geistesgeschichtlichen Ableitung des frühen Christentums’. The volume also contains a bibliography of Andresen's works. This is a worthy monument to a significant historian of the early Church.