The article presents the dendrochronological researches conducted between 2010 and 2013 at the tower and the choir roof structure of the Calvinist Church in Târgu Mureş. Corroborated with already known historical data, the information obtained throughout the analysis helps clarifying the chronology of construction and subsequent repairs implemented on the building. Furthermore, the article also presents the hypothetical reconstruction of the rafters in the choir’s roof structure, dated to the end of the 15^th century, contributing to our knowledge about this historical period. 

Keywords: Târgu Mureş, fortified church, Franciscan church, dendrochronology, historic roof structure, tower, dating