The development of the water supply on the Peloponnese in Greco-Roman times

It has long been clear that the water supply in ancient Greece was transformed over time, with the relative number of various types of water sources varying in time and space. Yet, what patterns this produced has never been explored, and the degree to which trends suggested by local or qualitative studies are representative for larger areas and patterns is unknown. The root of this uncertainty lies largely in the difficulty assembling an extensive and representative material beyond individual sites or cities. Following this, the present article has two aims. The first is to test and evaluate a method for collecting an extensive and (more) representative material for the investigation of the water supply in ancient Greece on a regional scale, based on a systematic review of the material from the Peloponnese published in Archaeological Reports 1887–2012. The second aim is to discuss how the collected data can be used to explore the transformations of the water supply systems on the Peloponnese in the period 900 BC–AD 300. Together the results are intended to develop further the WaterWorks project, which aims to create a better understanding of the development of the ancient water supply. The method produced a considerably better dataset than previously available. The dataset, recorded in an Access database, suggests that some hitherto acknowledged trends are probably valid for larger areas while others are less prominent than previously believed. However, in the end, the dataset is too limited to allow firm conclusions concerning how, and to a larger degree why, the water supply system was transformed over time. The dataset will be made publicly accessible in an open access repository.