Fortunatianus of Aquileia Wrote a Commentary on the Gospels in the Fourth Century and It's Free to Read

In the mid-three hundreds, Fortunatianus served as bishop of Aquileia and wrote a commentary on the Gospels. According to the History Blog, "it is the oldest surviving Latin commentary on the Gospels."

De Gruyter has kindly provided an entire English translation of the work. For those interested in the Gospels and early Christian interpretation of them, this is a wonderful resource.