The actually standing Calvinist church of Boldva is of a royal founding. The building functioned as a Benedictine abbey around 1175–1180. The archaeological excavations conducted between 1976 and 1982 uncovered 68 graves within the church. A 14–16 years old girl lay in grave no. 21 in perfectly preserved renaissance clothes. She probably died in 1567 or 1568 and she was a member of the Putnoky family of the Rátót clan. This family owned Boldva until 1570, and then the Basó family owned it for about 160 years. The girl’s uncle Mihály Basó lay in grave no. 14 and her mother Klára Basó in grave no. 17.
There were two large medieval buildings north-east of the 11th-century Benedictine abbey at Pásztó that passed to the Cistercians in 1191. Both were destroyed in the mid-13th century, at the time of Mongolian invasion, and never rebuilt. The excavated features and their finds indicate that the buildings had accommodated a glass workshop and a smithy worked by monks.