...

Again, in the north there was a church called that of Arsamosata, which was very strongly built and beautifully decorated. On a fixed day in each year, namely on the day of the commemoration of the martyrs who were deposited in it, many used to gather together thither from all quarters, partly for prayer and partly for traffic; for great provision was made for the people who were assembled on that occasion. When there was a great crowd collected of men and women and children, of every age and class, there were terrible flashes of lightning and violent peals of thunder and frightful noises; and all the people fled to the church, to seek refuge with the bones of the saints. And while they were in great fear, and were engaged in prayer and service at midnight, the church fell in and crushed beneath it the greater part of the people who were in it. This happened on the same day on which Nicopolis fell.

Joshua the Stylite, Chronicle composed in Syriac in AD 507