Nikolay Svyatosha was a 12th-century monk and prince who lived in the Kyiv Pechersk Lavra. Born Svyatoslav Davydovich Lutsky, he was the son of Prince David of Chernigov and a descendant of Yaroslav the Wise. After losing his lands during regional conflicts, he entered the monastery in 1106, becoming the first Russian prince to take monastic vows. He was known for his scholarly pursuits and his role as a mediator between ruling princes.