Justinian was known as the last Roman emperor; he and his court still spoke Latin, wanted to restore the old Roman Empire by reclaiming its lost lands, and neatly organized Roman law in one book, the Corpus Juris Civilis. This symbol stands for Senatus Publisque Romanus, The Senate and People of Rome.
Roman war with the Dacians - art by Giuseppe Rava ~ Of special note is the extra armour the legionaries wear on their arms. This was developed during the Dacian wars to help protect the Romans from the falx, a scythe like weapon the Dacians used with great effect against the Romans' Lorica segmentata armour. It sliced right through!