They are one of the earliest witnesses for the development of the Sardinian language and are an important source for historians of medieval Sardinia.
Later condaghes were kept by noble families for recording inheritances, purchases, donations (datura), transactions (tramutu) and litigation (kertu), principally when relating to the church.
The chief object of such records was to provide precise dates in case of legal dispute.
Physically, the first condaghes were scrolls: overlapping parchment manuscripts wound tightly around a kontákion.
[3] There is only a single condaghe of laical kind left, the one of Judge Barisone II of Logudoro.