On the same plateau as Hassan Tower, set across the esplanade from the Almohad minaret, stands the white-marble mausoleum that holds the king who led Morocco to independence in 1956. The Mausoleum of Mohammed V was commissioned by his son Hassan II shortly after the king's death in 1961, designed by the Vietnamese architect Cong Vo Toan, and completed in 1971 after twelve years of work by master craftsmen drawn from Fez, Tetouan and Marrakech.

The building reads from outside as a single white-marble cube under a pyramid roof of emerald-green tiles, with Royal Guards on horseback flanking the four entrances. Inside, the visit takes you onto a balcony that looks down into the lower chamber: Mohammed V himself in white onyx at the centre, his son Hassan II to one side, and Prince Moulay Abdallah to the other. A reader of the Qur'an is usually seated near the tombs. The chamber's carved cedar coffered ceiling, hand-cut zellige walls, onyx inlays and carved green-and-gilt dome are widely considered the most ambitious display of traditional Moroccan craftsmanship attempted in the 20th century.

The mausoleum is one of the very few royal-Islamic sites in Morocco explicitly designed to be open to visitors of any faith — a deliberate choice by Hassan II when he commissioned the building. Entry is free, no shoe-removal is required, and the visit takes twenty to thirty minutes. Cover shoulders and knees as a courtesy, photograph quietly without flash, and pair the stop with the Hassan Tower esplanade outside for a one-hour combined visit. The site is part of the historic ensemble of Rabat inscribed on UNESCO's World Heritage list in 2012.