During restoration work to the Spaso Preobrazhensky Cathedral in Pereslavl-Zalessky, an ancient Russian city 130km from Moscow, researchers found several ancient graffiti markings on the walls. They included some writing from the C12th about the murder of Prince Andrey Bogolyubsky, and a list of his killers. The Russian Academy of Sciences Institute of Archaeology has said that this is the earliest written record in North-East Rus. Moscow specialists, HSE Professor Alexey Gippius and Savva Mikheev from the Institute of Slavic Studies at the Russian Academy of Sciences made the find and are currently examining it.