The Tabularium was the Official Records ''Office'' of Ancient Rome, dating to the very beginnings of The Imperial Era. It was constructed in 78 BC. The Tabularium was located in The Forum of The City of Rome.
The Building was 220-feet long and 46-feet in height – and composed three floors. Made of brick, it was used to store Rome's important legal and military documents. Large upper windows and a open roof ''sky light'' provided much of it's daytime operational lighting.
Much of the surviving structure was remodeled in the 13th Century AD, completely changing it's original appearance.