Inside the interior of the oldest church of Saint Constantine in Svećani, a shapeless stone was found, on which a short inscription is carved with Glagolitic and Cyrillic letters using a sharp object. These enigmatic signs ('JAZEL') were engraved by either the church builder or a visitor. This inscription on the stone likely holds a magical significance and is related to the construction of the church itself; it could have been part of a foundation stone (perhaps a corner stone) with the meaning of protection against evil.
Dating: early 10th century. The simultaneous use of Glagolitic and Cyrillic letters in writing persisted until the beginning of the 10th century.