The Prisci were an ancient family of the Servilia gens, and filled the highest offices of the state during the early years of the republic. They also bore the agnomen of Structus, which is always appended to their name in the Fasti, till it was supplanted by that of Fidenas, which was first obtained by Q. Servilius Priscus Structus, who took Fidenae in his dictatorship, B. C. 435 [see below, No. 6], and which was also borne by his descendants [Nos. 7 and 8].