The research programme entitled The Batavians. Ethnic identity in a frontier situation was launched at the Archaeological Centre of the Free University (ACVU) in Amsterdam in 1999. Supported by the Netherlands Organisation for Scientific Research (NWO), it is scheduled for completion in 2004. The study before you is part of this research programme and aims to provide a synthesis of the formation and earliest beginnings of the Batavian identity group in the context of the Roman empire.

I have worked on this book with considerable pleasure over the past few years, and am fortunate to have been able to do so in such a stimulating and supportive environment. I therefore wish to thank all my colleagues at the ACVU for their discussions on the many topics touched on in this book and for their critical comments and advice on draft versions of the individual chapters. In particular I would like to thank Joris Aarts, Ton Derks, Fokke Gerritsen, Jan Kolen, Johan Nicolay, Jan Slofstra, and Ivo Vossen. I highly appreciated the enthusiasm and encouragement which Jan Slofstra has always shown toward my research; I am glad that it was possible for us to work together for several years as colleagues at the same institute. For the illustrations and the final layout of the book I am indebted to Bert Brouwenstijn, who was sometimes assisted by Jaap Fokkema.

I would also like to express my appreciation to all the people and institutions that have helped in some way to make the publication of this book possible. I am grateful to Louis Swinkels and Annelies Koster of the Museum het Valkhof in Nijmegen for making photographic material available. Jan Thijssen and Harry van Enckevort provided information about some unpublished finds from Nijmegen. I wish to thank the State Archaeological Service (ROB) in Amersfoort for their warm hospitality during my sabbatical leave in 2003. And I would also like to thank the ROB, and W.J.H. Verwers in particular, for granting permission to publish the architectural remains from Kessel. I am grateful to Kees Peeterse (Pansa BV, Nijmegen) for his suggestions about the reconstruction of the temple of Kessel. Curators of various museums have helped me in my examination of the find material, in particular the Rijksmuseum van Oudheden in Leiden, the Noordbrabants Museum in ‘s-Hertogenbosch, Museum het Valkhof in Nijmegen, and the Galloromeins Museum in Tongres.