Smlednik Castle was presumably built in the 12th century on the foundations of a prehistoric fort and a Roman stronghold of a later origin. The strategic location of the hill overlooking a crossing of the Sava River was appreciated by the first lords of the region, the Counts of Weimar Orlamunde, who built a defence tower on the hilltop in the 11th century. The tower was then expanded in several phases, but remained unaltered after 1610 and is thus the purest example of the architectural development of a mid-sized medieval castle in central Slovenia.
The famous Slovenian chronist Janez Vajkard Valvasor reffered to the Smlednik castle as a ruin already in the second half of the 17th century.
The first written record of church in Danmark locality date back to the year 1291. Close to the church are several stones with a Christian text and cross inscribed. The oldest parts of the present red-brick church are from the 1300s. In the late 1400s the church was enlarged to the appearance it has today. The church has been modified both internally and externally several times, among other things after the fires in 1699 and 1889. There are lot of well-preserved mural paintings in the walls.