The historic Maarid Castle, Qasr Maarid in Jouf, Saudi Arabia

These designs are still prevalent and can be seen in modern buildings. A Czech explore, Mr. Alois Musil visited the castle in the year 1915. He believes that the mud-brick superstructure and the four slender towers on the corners were built by Nawwaf.

So we can conclude that the foundations of the castle were set up by the Nabataens while the upper structure must have been destroyed (or damaged) and was rebuilt by the Nawwaf. Also, history reveals that the castle was rebuilt in 1913 by Nawwaf bin Nuri bin Shalan.

For those who do not know, the castle was occupied and that too in recent times! However, in the past, it was a renowned center for the Arabs. Due to its strategic position, everyone wished to capture it. It was the very reason why Muslims went for three expeditions for gaining it during the life of the Prophet PBUH. 

Hazrat Khalid Bin Waleed R.A was able to capture the ruler of Duma during the third expedition. Khalid bin Walid took along an army of 420 riders to conquer Duma. Ukaidir, who was the ruler of Duma at that time, was captured. This indicates that the place was of great significance.

I think if you have even a little bit of interest in the history, make sure you visit this archaeologist place in Saudi Arabia.