The French historian Nicholas Petrovitch sheds light on a repeated mention of the queen Hélène d'Anjou's sister named Maria in D. Farlati's oeuvre. Here, Farlati mentions that she, together with her son Anselme, were buried in the Monastery of Saint Mary or Saint Marcus in Ulcinj and that the monastery was (probably) founded in 1288, as were other franciscan establishment of the Hélène d'Anjou period:

"[...] Monasterium S. Marci de Dulchinio per Dominam Mariam de domo Chieriz de Francia Reginam de Zenta [...] Qua regina jacet sepulta in Ecclesia S. Marci de Dulchinio coram altare majore cum Domino Anselmo ejus filio;" (Farlati VI, p. 440).

"[...] Monasterium S. Mariae de Dulcigno per dominam Mariam de Domo Chiutiz de Francia Reginam de Zenta [...] Quae regina jacet sepulta in templo S. Mariae, al. S. Marci, de Dulcigno coram altare majore sub pavimento cum Anselmo ejus filio." (Farlati VII, p. 59).