Qasr al Hosn is the historical nucleus of Abu Dhabi.

"Qasr Al Hosn is the oldest and most significant building in Abu Dhabi, holding the city's first permanent structure; the watchtower. Built in the 1790, the commanding structure overlooked the coastal trade routes and protected the growing settlement established on the island. Qasr Al Hosn comprises of two major iconic buildings: the Inner Fort (originally constructed in 1795) and the Outer Palace (1939-45). Over the centuries, it has been home to the ruling family, the seat of government, a consultative council and a national archive" https://abudhabiculture.ae/en/experience/historic-landmarks/qasr-al-hosn

During the renovation work, a temporary exhibition on Qasr al Hosn was shown at the Cultural Foundation, documented by some photos from 2014.