They numbered in 1716 51 families and three Franciscan friars, established their own neighbourhood, which was known to the locals as "Greci" ("Greeks", i.e. "merchants"). Their influence over local affairs caused Deva to be officially called a "Bulgarian town" for a short period, even though the maximum population of the colony was 71 families in 1721. The Bulgarians received royal privileges of the Austrian crown along with their permission to settle and their acquisition of land and property. The construction of Deva's Franciscan friary commenced in 1724 with the funding and efforts of its Bulgarian population, so that the monastery was commonly known as the Bulgarian Monastery. However, the Great Plague of 1738 and the gradual assimilation of the Deva Bulgarians into other ethnicities of Transylvania prevented the colony from growing and by the late 19th century the Bulgarian ethnic element in the town had disappeared completely.