Archaeological excavation of ancient Dubno monasteries, founded by dukes Ostrozki, much disclose the history of these places. In their time, they defined original culture-religion character of the town. Investigation on the territory of Voznesenskyi monastery with large square in 2018–2022 gave possibilities to analyze large items from end of XVI – first third of XIX cc. There were the original fragments of pottery found among ceramic complexes. They have scratched letters in graffiti technique. Total found six specimens of pottery with such kinds of marks. The territorial and chronological frameworks of everyday using of such wares are considered. The review of European monastery complexes with similar founds witnesses about wide culture context of this phenomena. After the discovery these finds, dated of XIII c., in Cistercian monastery in Herkenrode monastery (Belgium), the interest for its study had significantly grown. Subsequent investigation allowed to find many potteries scratched with letters marks in women monasteries in Belgium, Netherlands, France and Lithuania. As far as we know, the fragments identified on the excavation near Dubno are the first facts of such finds in Ukraine. The possibilities of use the pottery with scratched letters are under consider in the article. They are associated with the social structure inside the monasteries. Written sources show that some part of nuns stood out in the economic status and ate better dishes. In addition, this could do novitiates. These pottery might use also in the medical purposes.