It is with great pleasure that we present you the proceedings of the International Symposium “The Acoustics of Ancient Theatres”, SAAT 2022, held at Palazzo della Gran Guardia in Verona, Italy, from 6 to 8 July 2022. The Symposium was organized by The Acoustical Society of Italy (AIA) and the European Acoustics Association (E.A.A.), with the collaboration of the Hellenic Institute of Acoustics (HEL.IN.A.). It has been the second on this topic after the one held in Patras (Greece) in 2011, and aimed to bring together experts to present and discuss all aspects related to the acoustic properties of these monuments, which are often still used for public performances including opera, drama, speech and music. The evolution and development of new technologies for the multichannel measurement systems, together with acoustic simulations, auralisation methods and virtual reconstructions, have generated renewed interest in these spaces. These aspects, as well as more interdisciplinary studies, have been presented and discussed. The event has been included among the initiatives of the International Year of Sound (IYS 2020) promoted by the International Commission for Acoustics (ICA).