Tabularium was a Roman state, military, temple, city archive, etc., in which the most important documents and legal acts were stored and legal acts written on tablets, rolls of papyrus and parchment. Such an archive was initially administered by censors, and later by specially appointed curators.
In 83 BCE the archive was destroyed during a fire on Capitol Hill. The oldest, known and partially preserved Tabularium in Rome was rebuilt in 78 BCE by Quintus Latatius Catulus at Roman Forum at the foot of the Capitol.
The fragment of the first floor wall integrated into the Senator’s Palace has remained to our times from the former building.