Prilep, town, North Macedonia, south of Skopje on the Titov Veles–Bitola railway line. Prilep was an important centre during the Middle Ages. St. Nikola’s Church (1299) has valuable frescoes. The Monastery of Archangel Michael and the Church of St. Dimitri both date from the 14th century, during which time the castle was built by a national hero, Marko Kraljević. The fertile Prilep Basin, or Pelagonija lowland, is a centre for fruit and tobacco growing and leatherworking. Silica bricks and insulating materials are made from local diatomaceous earth. Pop. (2002) 66,246; (2016 est.) 64,830.