The Church of the Holy Cross in Nin was built in the 9th century. It is the most valuable preserved monument of old Croatian church architecture and is one of the symbols of the city of Nin. In the time of Croatian rulers, it served as the court chapel of the nearby duke's court. The church was built on the remains of ancient houses, and these remains are still visible today. Due to the specific position of the windows and the angle of incidence of light, this small church is a kind of calendar, so the exact position of the solstices and equinoxes can be determined by the sun's rays.