قلعة المرقب, Defensive castle in Majmaah, Saudi Arabia

Al-Marqab Fortress is a circular, conical fortification perched atop Mount Munaikh, overlooking the city from the western side. Two towers are connected by a spiral staircase, with the inner tower containing a 12-step staircase to the summit where guards maintained watch.

Majmaah was founded by Abdullah bin Saif Al-Shamari at the start of the 9th Hijri century, and the Munaykh tower was built in 830 AH to protect the growing town. Imam Turki bin Abdullah entered the fortress in 1238 AH and removed its ruler, Mazyad bin Hamad bin Othman Al Saif.

The fortress displays regional building methods, constructed with locally quarried stone and clay materials. The craftsmanship is evident in how materials were fitted together to create a durable structure.

The tower stands on Mount Munaikh west of Majmaah, reached by a short flight of stone steps to a wooden door at the base. Inside, a 12-step stone staircase and a spiral stair between the inner and outer towers lead to the roof. The passage is 1.10 to 1.40 metres wide, so larger visitors should take care.

The fortress served not just as a defensive structure but also as an administrative hub where ammunition and supplies were stored. This dual function made it a crucial point for controlling the city and surrounding areas.