Known as Pereyaslavl until the 15th century, it was founded in 1152 by Prince Yury Dolgoruky as a projected capital of Zalesye. In 1175–1302, the town was the seat of the Principality of Northern Pereyaslavl (not to be confused with the Principality of Pereyaslavl in modern-day Ukraine). In 1302, it became a part of the Grand Duchy of Moscow. Pereslavl-Zalessky was devastated numerous times by the Mongols between the mid-13th century and the early 15th century. In 1611–1612, it suffered from the Polish invasion.