St. Martin's Church in Prozorje is located near Dugo Selo. Since 2002 the Institute of Archaeology led by Juraj Belaj has been doing archeological-conservational research of the church and its surroundings. During the archaeological research, several phases of construction and upgrade of the church have been found. The oldest phase is from the Romanesque period. In that period, Templars are situated on the Martin Breg area. The second phase belongs to Gothic period, in which Hospitallers can be found on Martin Breg area. Discovered Late Gothic phase is from the period after Hospitallers withdrawal from Martin Breg area. The church was upgraded in Modern Age with chapels, bell tower, auditorium and sacristy. Discovered cemetery had been used from the 12th century up until 18th century. The graves of different stages of preservation and many other foundings have also been found. Most of the foundings are from the Modern Age. The ruins of the church are in the late Gothic style with Baroque elements. The location is relevant because of the arrival of Templars and Hospitallers to the area of Martin Breg. It is also important because of its connection with Slavic mythology where Martin Breg stands out as one of three points of the pagan holy triangle.