The Libyan caretaker and a tourist guide sit at the entrance to the Qasr or fortified granary in the village of Qasr Al-Haj on Jebel Nafusa. Built in the second half of the 12th century AD, the Qasr is the best example of Berber architecture in Libya. Qasrs operated as storage banks for local farmers and were central to village life. Built from rock and gypsum and sealed with doors made from the trunks of palm trees. Barley and wheat were stored above ground, with olive oil stored in underground chambers.