In Chronicon Ad Annum 1234 there is a report of an earthquake that destroyed Marash, where its houses were destroyed, its whole wall collapsed, and 24,000 died besides strangers along with more than a hundred priests and deacons. The *Chronicon* also records that the castle of Mansur and many other places were wiped out. A later passage appears to suggest that a prison in Samosata collapsed during the same earthquake. The Seleucid Era years supplied in the two separate passages do not agree, and both appear to be incorrect. However, the earlier passage specifies both a date (29 November) and a day of the week (Sunday), leading to the conclusion that the earthquake struck on the night of Sunday, 29 November 1114 CE, in agreement with many other authors.