[2] She was the daughter of Byzantine Emperor Constantine V. During a campaign in Paphlagonia, Emperor Constantine V summoned the abbess Anthusa of Mantinea (Saint Anthousa the Elder), who he had tortured earlier for worshipping icons, and asked for her prayers due to the difficulty of the empress' pregnancy.

[4] The abbess predicted the birth of twins, and the daughter was named in her honor.

[1] Anthusa of Constantinople was the daughter of the iconoclast Byzantine Emperor Constantine V and one of his wives.

After the death of her father, Anthusa used all her personal property to help the poor and the orphaned.

According to one source, Anthusa lived to the age of fifty-two, and died in 801 AD.