The Hassan Tower, also known as Tour Hassan, is a minaret located in Rabat, the capital city of Morocco. It was built in the 12th century during the reign of the Almohad dynasty. The tower was intended to be the largest mosque in the world at the time, but was never completed due to the death of the Almohad ruler Yacoub al-Mansour.

The tower stands at 44 meters (140 feet) tall and features intricate decorations and designs, including horseshoe arches, geometric patterns, and calligraphy. The tower is made of red sandstone and features a square base with a tapering cylindrical shape. There are also a number of ornate doorways and windows throughout the structure.

Today, the Hassan Tower is a popular tourist attraction in Rabat and is often visited alongside the nearby Mausoleum of Mohammed V. The tower and the adjacent mosque ruins are a UNESCO World Heritage Site, recognized for their historical and cultural significance. The tower is also used as a symbol of Rabat and is featured on the city's coat of arms.