A journey through the pictorial language of Rome for a century and a half: from the years of absolute splendor, between the end of the 12th and the beginning of the 14th century − when the churches and the basilicas of the towns were covered of new frescoes and bright mosaics − to the decades when the papal headquarters moved to Avignon, to the start of the fifteenth century, when, with the return of the Pope in Rome, the city returned to be the “center of the world”, the place where the artists gathered to animate the season of the early Renaissance. The works of Pietro Cavallini, Jacopo Torriti, Filippo Rusuti, Giotto, Masaccio, Masolino and Gentile da Fabriano, miraculously preserved and documented, appear in the volume with a richness of illustrations and notes that is common among the works of this Corpus-Atlas. New photographic campaigns that show paintings and mosaics as never before, new archive materials, in-depth research on historical records; an indispensable tool for specialists, students and art lovers, as well as lovers of the city of Rome. The book has a wide introduction and 137 sheets organized in cronological order. The photographic campaign consist of 550 pictures, all in big size.