The reconstruction of population-levels for ancient cities is a difficult undertaking. Many methods are present in the literature, each with their own (dis)advantages. This paper presents an illustration on the methodological issues encountered in the reconstruction of the population-levels of an ancient city. The city of Corinth is used as an example, since it has a long history of scholarly interest (including demographic) and it is considered to have played a pivotal role in Roman Greece. Excavations at the site of Corinth have revealed a strongly monumentalized site which seems to at least equal its Greek predecessor. In terms of population, Corinth has been estimated as one of the larger cities in Roman Greece. Corinth is therefore a focal point of academic attention for researchers both directly and indirectly involved in its studies.