In his most important treatise, the De Re Aedificatoria (1452), referring to the design of sacred buildings, Alberti proposes a blending of Classical and Christian architecture.
Considered daring by the fifteenth-century commissioners, his theories were not fully exploited until the end of the century; among the projects of Alberti in Florence is also the circular Tribune of the church of the Santissima Annunziata, crowned by a cupola constructed in line with the techniques of ancient Roman architecture.
