Over the last two thousand years BC, during the Bronze Age, the first fortifications and stone wall buildings were erected by Liburian peoples. They could serve as shelter to the population from the surrounding villages in case of danger, and some of them may have been permanent settlements where the local rulers had their seats. In addition, they oversaw important cattle and trade routes leading to Velebit and further to Lika via Paklenica or Rujan. Some of them served to oversee navigation. They are now destroyed, but ring-shaped mounds up to several meters in height can still be seen in some places. In immediate vicinity of the fortifications, you can find casket heaps ? deposits of large round stone under which former rulers were buried in casket made of stone tablets. Most of them have been dug out and the graves have been robbed, but they can still be spotted here and there, like in the area of the village of Ljuboti? above Tribanj-Kru??ica.
