The Lozen Monastery "Saint Spas" is situated at the northern slopes of Lozen Mountains on a small terrace under the Polovrak peak. The old monastery has been most probably built during the Second Bulgarian Kingdom. It has been plundered and destroyed by the Turks during the conquering of the Urvich fortress and Sofia in 1382. During XVII c. the Lozen monastery is restored and the present-day church is built in 1821. In its original design it has been a single-chamber building with a massive semi-cylindrical vault. Almost a quarter of a century later, in 1847, its interior is painted with the money of priest Kiryak from Vratza, who is the abbot of the monastery. When the Turkish government allows the Christians to build churches with more expressive architectural forms master Tzvyatko Todorov from the Radomir Region breaks the vault and builds three domes, carried by a light frame-built construction. In 1869 the famous icon painter Nikola Ivanov Obrazopisov, with the help of his students from the Samokov art school paint the church again. They follow a new way of distribution. This diversion from the traditional style is deliberately made, so as to create a special place for the Bulgarian national saints. Much stronger influence on the conscience of the enslaved people have had the images of Bulgarian saints as: "Prince Boris I (Mihail)", "Ivan Rilski", "Patriarch Evtimii", "Nikola Novi Sofiyski" and others. The mural paintings have characteristic fresh and contrast tones, simple and light decoration of the clothes.