The Prejmer fortified church is a Lutheran fortified church in Prejmer (Tartlau), Brașov County, in the Transylvania region of Romania and the ethnographic area of the Burzenland. The church was founded by the Germanic Teutonic Knights, and then was eventually taken over by the Transylvanian Saxon community. Initially Roman Catholic, it became Lutheran following the Reformation. Together with the surrounding village, the church forms part of the villages with fortified churches in Transylvania UNESCO World Heritage Site.

A fortified church is a church that is built to serve a defensive role in times of war. Such churches were specially designed to incorporate military features, such as thick walls, battlements, and embrasures. Others, such as the Ávila Cathedral were incorporated into the town wall. Monastic communities, such as Solovki Monastery, are often surrounded by a wall, and some churches, such as St. Arbogast in Muttenz, Switzerland, have an outer wall as well. Churches with additional external defences such as curtain walls and wall towers are often referred to more specifically as fortress churches or Kirchenburgen.