Catholic Encyclopedia
St. Apollonia, a virgin, possibly ordained (Bishop Dionysius of Alexandria calls her "parthenos presbytis"), martyr at Alexandria in late 248 or early 249.
For All the Saints
Illustrated hagiography of St. Apollonia.
Patron Saints Index
Profile of St. Apollonia, also known as St. Apolline. Illustrated. Since 1969, her feast has been restricted to local calendars.
Vietnamese Eucharistic Youth Society
The story of St. Apollonia. Suitable for children.