Philostorgius was born c. 364 AD. He wrote a History of the Church up to the year 425 AD. Only a summary has been preserved, compiled by Photius in the ninth century.

Ecclesiasticae Historiae XII,3.
[AD 409] [Alaric] accordingly seized the port of the City without delay. This was the largest arsenal of the Romans, consisting of three ports, and stretching out till they equalled a small city in magnitude: the whole of the state's corn supply was stored up here according to ancient custom.

Translation: Walford 1855 amended by C. Whitton.