San Benedetto dei Marsi (Latin: Marruvium, Marrubium; Ancient Greek: Μαρούϊον, romanized: Maroúïon) is a comune and town in the province of L'Aquila in the Abruzzo region of central Italy.

It is on the eastern shore of the dried Lake Fucino, 20 kilometres (12 mi) from the remains of another ancient site, Alba Fucens.

[3] In accordance with this, Silius Italicus also describes Marruvium as deriving its name from a certain Marrus, who is evidently only an eponymous hero of the Marsi.

[6] It is noticed in the Tabula Peutingeriana, which places it 13 Roman miles from Alba; but it was not situated on the Via Valeria, and must have communicated with that high-road by a branch from Cerfennia.

[7] The town was an episcopal see in the Middle Ages, being destroyed in 1340 during the Angevine wars for the conquest of the Kingdom of Naples.