They also found a stone altar that had been carved out of the rock of the mountain by St. Luke and was used by him in the Divine Liturgy, in the place were he lived in asceticism for years. With much joy, gratitude and devotion, the monks Theodore and Simeon took the icon out of the cave and began to clean it. However, a violent dragon soon appeared from the cave, but by the Grace of Christ and Panagia's Holy Icon, it was struck by lightning and died. (The bones of the dragon remain to this day).
Inside the cave they constructed a small church and some small cells with the assistance of the crowd of believers, who came to venerate the miraculous image of the Virgin Mary and to hear the Word of God from this Godly-preachers, Fathers Simeon and Theodorou. Many of the crowd remained as monastics.
This Holy Icon of Panagia has worked many miracles throughout the centuries, and continues to provide support to the faithful. It is made out of mastic and wax using the encaustic technique, and many admit that it fits the time period and location to be actually painted by the hand of the Evangelist.
Apolytikion for St. Euphrosyne the Righteous in the Plagal of the Fourth Tone
The image of God, was faithfully preserved in you, O Mother. For you took up the Cross and followed Christ. By Your actions you taught us to look beyond the flesh for it passes, rather to be concerned about the soul which is immortal. Wherefore, O Holy Euphrosyne, your soul rejoices with the angels.
(altered from: http://goarch.org/chapel/saints_view?contentid=225&type=saints)
The Kontakion and Oikos from the Service of Sts. Symeon, Theodore and Euphrosyne the Righteous, discoverers of the icon of Panagia Megalospilaiotissa and founders of the Monastery of the Great Cave (the full 1706 edition of the service in Greek is available under the title "Σύναξις κανόνων τινών εγκομιαστικών της Υπεραγίας Θεοτόκου, της εν τω μεγάλω Σπηλαίω του εν Πελοποννήσω όρους Χελμού..." here: http://anemi.lib.uoc.gr/)
Most-holy Theotokos, save us!