The preliminary results of a survey of ancient Hermione (epichoric Hermion) are presented in this paper. The survey was conducted during three short campaigns over the period 2015–2017, and focused on the urban layout and development of the ancient city. Because the ancient city area more or less coincides with modern Ermioni, the investigation was mainly restricted to the documentation and analysis of architectural remains that were both still visible above ground and accessible. However, the report also includes a thorough re-evaluation of previous scholarship, taking into consideration remains that are no longer visible. The author identifies three questions of particular interest, relating to the exact location, extent, and potential relocation of the ancient city, and points to the lack of a coherent interpretation. On the basis of present data, the author proposes that Hermione was indeed relocated to a new site, less than 1 km away from its original position, in the early 3rd century BC, and highlights the urban, social, and religious consequences of such an event. However, pending further evidence, the suggested scenario remains a hypothesis.