Population of the county of Berguedà with a census of 121 inhabitants, Montclar can be assured that as inhabited place, it already existed from the end of the Roman world and the beginning of medieval times (towards the 6th century or the 7th century).
At the highest average age, between the seventh and tenth century, the first function of the hill of Montclar should have been to make an oppidum, a fortified place and a natural refuge for the surrounding population and its livestock.
All indications confirm that it was a fortified town, where probably in Carolingian times a church was built (dedicated to Sant Martí). Until the ninth century the traditionally dispersed settlements, farmhouses, huts, huts and towers, and even primitive forms of housing, such as the caves, remained throughout the region.
Two "Strada" or Ral roads converged on Montclar. A real road to the South-North route from Cardona to Berga. And the other from east to west joined the areas of Lluçanès and Baix Berguedà with the Solsonès.
The most noteworthy places of interest are the Church of the Holy Cross, the Castle of Montclar and the Church of San Sebastián.