Saint Donatus (April 30) lived during the times of Emperor Theodosius the Great (379–395 AD). He was born around 330 AD in Euroia and was educated in Butrint of Epirus. At the age of thirty, he was ordained Bishop of Euroia and served as bishop for sixty years. He also participated in the Second Ecumenical Council. Other sources consider that the Saint originated from the West, since this name was very common there. Saint Donatus is the Patron Saint of Paramythia.

The hagiographical sources testify to a multitude of miracles by the Saint. In the Synaxarion, the miracle of the Saint who killed a dragon (gigantic snake) is also mentioned. Near Euroia there was a village called Soreia, in which there was a spring, from which whoever drank died. When the Saint learned of the fact, he took with him other priests and went to the spring. The moment he arrived there, a thunderclap was heard. Immediately, a dragon appeared before him, which had its nest in the spring. As soon as the Saint turned his gaze and saw the beast, he took in his hands the rope with which he was striking the donkey on which he was riding, struck the beast on the back, and it immediately fell dead to the ground. Subsequently, the Saint blessed the spring, drank water from it first himself, and then urged the others to drink without any fear. They indeed drank and rejoiced and returned safely to their homes.