The volume presents the find material of the Kampfhammer Collection, which was mainly gathered during building measures in 1969-1975 and has been handed over to the Passau Archaeological Service as a permanent loan. It provides a horizontal section across the old city centre and punctually of the so-called 'Inn town' [Boiodurum] and thus first hints at the archaeological development of settlement. Despite its random character and the absence of stratigraphical observations, it was possible to gain important clues as to the settlement history of the Celtic and Roman period, mainly through the horizontal chronology of the find distribution. A catalogue organized by find sites, is followed by an analysis of finds according to groups such as coins, metal finds, objects of bone, steatite, and pottery, glass finds, pottery vessels, and stone implements. The book ends with an attempt at an archaeological interpretation of the settlement evidence for the Late Latène period with an interruption not before 20 B.C., the early/middle Roman period [starting ca. A.D. 50-70], Late Antiquity [until the later 5th century], and an excursus on the three potential fortresses in the old city centre of Passau.