The Dârjiu church is based on an ancient Roman basilica whose elements are dating from the XIIIth century. The Szeklers (a Hungarian ethnic group mostly living in the Harghita, Covasna and Mures counties) began raising the current building in the late XIVth century and ended in the late XVth century. The fortifications were built in the XVIth century, comprising five bastions, bell towers and defensive walls of stone.
The church acquired its present form in the late XVth century, by having a Gothic extension. Particularly valuable are the frescoes representing St. Ladislaus legend (the Hungarian king who brought the Szeklers in Transylvania), dating back to the earlier Protestant Reformation. These murals were covered during the Reformation and were rediscovered in the XIXth century.