The Monastery of the Holy Trinity in Pljevlja is a medieval monastic complex of the Serbian Orthodox Church, located in Montenegro. Its history dates back to before the Ottoman conquest in 1465, when a wooden church already existed on the site. The first mention of the monastic community comes from 1573, when a monk named Sava copied a manuscript. The architectural value of the monastery lies in its unusual, almost square shape with a large apse and a division into three nave sections supported by four pillars. The central part is covered with a barrel vault, while the sides feature semicircular vaults. The monastery is a treasury of Serbian culture and spirituality, preserving traditional costumes and many valuable liturgical objects from the 16th century, such as pyxes and chalices. The iconography of the monastery was rich and intriguing, including works by renowned Serbian artists like Zograf Longin of Peć. A well-known scriptorium was led by the monk Gavrilo, whose works have survived to this day in various European cities. The monastery is also home to exceptional icons, including depictions of the Nativity and the Baptism of Christ, highlighting its artistic significance. Interestingly, in 1941, during fighting in Pljevlja, Archimandrite Serafim Džarić was executed, reflecting the turbulent history of this place. The architectural ensemble and artistic compositions have made this monastery not only a place of worship but also a cultural center for centuries.