Saint Matthew, from the Ebbo Gospels (816-835)
The wavy lines that form the details on Matthew's clothing and the diagonal lines adding detail to the background and foreground are examples of the energetic subject matter in the Ebbo Gospels.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"434px-Saint_Matthew2.jpg."
https://upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Saint_Matthew2.jpg/434px-Saint_Matthew2.jpg
Wikimedia
Public domain.
