Ипатьевская летопись
After Nikolay Karamzin, Ludza was first mentioned as "Лючин" in Hypatian Codex dating back to 1173 or 1177. In 1399 the Livonian Order built a stone fortress atop an older Latgalian fortress and used Ludza as an eastern outpost in Livonia. Ludza Castle ruins can be visited nowadays.