The sister of the Emperor Honorious (392-450), Galla Placidia held court in Ravenna with the most Roman ostentation... Her mausoleum is an impressive 5C construction in the form of a Latin cross, its architectural harmony evident in the deep blue of its vaulting and dome which is decorated with stars and floral motifs. In the tympanum and on the pendentives, the mosaics have a symbolism redolent of peace.