These beautiful historic watchtowers were used for both scanning the desert for enemy invaders and observing the celestial world. The towers were built in the late 1800s and renovated in 1910 during the reign of Sheikh Mohammed bin Jassim Al Thani. They served a dual purpose: In addition to being watchtowers installed to ward off the possibility of another Ottoman invasion, the towers were also a site for astronomical observations. It was here where astronomers studied the Moon during Ramadan.