The Holy Relics have been treasured and protected by the Monastery for 1100 years, until their theft (or as the Metropolitan discusses in the video linked to below, "abducted", as through the Holy Spirit, they are as a living individual). For a video of the Monastery and the Holy Relics, while the Metropolitan of Milteus discusses this tragedy (in Greek), see: http://www.amen.gr/index.php?mod=news&op=article&aid=9242.
Below I include the megalynaria from the Paraklesis to St. Anastasia (amateur translations from the full Greek text), that we might be mindful of this tragedy, pray for forgiveness of our many sins from the Resurrected Lord, and entreat Him for the return of the Holy and Grace-filled Relics of His great servant and martyr.
Excerpt from the Paraklesis to St. Anastasia Pharmakolytria (amateur translation)
The adornment of Virgin-martyrs, and the inexhaustible treasury of healings, the bride of the Lord, the treasury of graces, O chaste Anastasia, we hymn you.