Mohammed V was the Sultan of Morocco during the first half of the 20th century. And after a brief period of exile, he came back and then became King. The airport in Casablanca is named after him. And his mausoleum is located in Rabat, which I visited.
The mausoleum is located near the river that borders with Sale, and is on a high hill. The plaza also includes the Hassan II Tower, unfortunately the tower was being renovated when I was there. The tower actually is the minaret of an incomplete mosque, and the pillars scattered around the plaza are meant to symbolize the unfinished aspects of this mosque. Nowadays, there is a mosque next to the mausoleum which can only be entered by Muslims.
This is the interior of the mausoleum, which contains the tombs of Mohammed V, as well as his two sons, Hassan II and Prince Abdallah. There should be a Koran reader sitting by the corner, but for some reason he wasn't there when I checked it out. The interior design is as expected, very intricate and typical Moroccan. Entrance is free, but guests are requested to be modest.
So check this out. It's an interesting place to visit in Rabat, without the throngs of other tourists.