During the last decade, acoustic pots inserted into the walls and roofs of medievala nd modern churches have been the focus of renewed scientificc uriosity after al ong time of relative silence. Traditionally,a uthors from the Middle Ages to the present time considered that Vitruvius established the relation between the "vasa aerea" (bronze vessels)i nancient Greek theatres and the "fictilibus doliis" (earthen vessels). Vitruvius'stextand philosophyi sa nalysed with regards to acoustics, and his recommendations are compared with medieval, modern and contemporary texts about acoustic pots. Most of them hints at an acoustical purpose for the pots. Therefore, the literature survey is supplemented with an acoustical survey of 25 French churches where pots still remain. Recent measurements and observations in some those churches, completed with recent data from foreign studies, are consistent with an acoustical purpose of the pots to decrease the reverberation time at frequencies strongly excited by the spoken voice. . and amuch smaller component about the acoustical experience of his time. Consequently,t he scholars connected pots with an ancient acoustic device, namely echea,akind of bronze vessel, that Vitruvius describes within his description of Greek theatres (V,5).In the 19th century,these early works on Vitruvius's De Architectura were the only evidence of apossible acoustical origin and basis for the pots discovered in the churches. Researchers, archaeologists as well as acoustic specialists, accepted this evidence with little thought, comprehension or critical assessment. Form ore than one and a half centuries , the question of acoustic pots wasm ainly addressed by archaeologists. To our knowledge, the only acoustical studies have been by R. Floriot [4] in France, followed by J.-M. Fontaine [5] fifteen years later,abroad P. V. Brüel in Denmark in 1947 [6] and I. Koumanoudis, in Greece, in 1967 [7]. In the last two decades, the subject has seen ar enewalo fi nterest especially in Europe [8,9,10,11,12,13], where am ultidisciplinary approach has been employed [14,15]. Al arge part of these recent studies has been recently published in French in aspecial issue of the "Bulletin Monumental" 70 ©S.Hirzel Verlag · EAA Valière et al.:A coustic Pots in ancient and medievalbuildings ACTA ACUSTICA UNITED WITH ACUSTICA Vol. 99 (2013)