Proceedings of the XV World Congress UISPP (Lisbon, 4-9 September 2006). Volume 46. Session C75. This book includes papers from Session C75, Archaeologists without Boundaries: Towards a History of International Archaeological Congresses (1866-2006) presented at the XV UISPP World Congress (Lisbon, 4-9 September 2006) / Actes du XV Congr s Mondial (Lisbonne, 4-9 Septembre 2006).