Qasr Al Hosn - An Historic Landmark
Qasr Al Hosn is the oldest and most significant building in Abu Dhabi, holding the city’s first permanent structure; the watchtower. Built around the 1790’s, the commanding structure overlooked the costal trade routes and protected the growing settlement established on the island.
https://visitabudhabi.ae/en/see.and.do/attractions.and.landmarks/iconic.landmarks/qasr.al.hosn.aspx