The present paper wishes to examine the possibility regarding the existence of an unknown seal of the convent of Cluj-Mănăştur, one of the two major places of authentication in Late Medieval Transylvania. Starting from original documents dating back to the first decades of the 14th century, preserved by the national archives systems of Hungary and Romania, after detailed analyses one could observe the presence of several sealing traces of an ogival form, in contrast to the two round seals known by the subject‘s historiography and used successively up to the mid-16th century. Therefore, the purpose of the present work is to bring several clarifications regarding these seal fragments, which in the end reveal themselves as one of the fundamental characteristic from the beginnings of this place of authentication.

Keywords: sealing practice, ogival seal, loca credibilia, diplomatics; abbot,