Аннотация:The teatro all'italiana , or Italian opera house with boxes, was one of the most successful building types invented during the Renaissance, but fragmentary and ambiguous evidence has made locating its origins difficult. This article proposes that those origins are to be found in two theaters for commedia dell'arte built in Venice in 1580 and destroyed by order of the Council of Ten in 1585 (m.v.). The history of these two theaters is sketched here for the first time by means of documents recently found in the Archivio di Stato, Venice, that also include new information related to Palladia's Teatro Olimpico in Vicenza. The role the two Venetian theaters played in the economic, political and social history of the city is suggested.