The Moorish Castle is the name given to a medieval fortification in Gibraltar comprising various buildings, gates, and fortified walls, with the dominant features being the Tower of Homage and the Gate House. Part of the castle itself also housed the prison of Gibraltar until it was relocated in 2010. The Tower of Homage is clearly visible to all visitors to Gibraltar; not only because of its striking construction, but also because of its dominant and strategic position. Although sometimes compared to the nearby alcazars in Spain, the Moorish Castle in Gibraltar was constructed by the Marinid dynasty, making it unique in the Iberian Peninsula.

Gibraltar is a British Overseas Territory and city located at the southern tip of the Iberian Peninsula, on the Bay of Gibraltar, near the exit of the Mediterranean Sea into the Atlantic Ocean. It has an area of 6.7 km2 (2.6 sq mi) and is bordered to the north by Spain. The landscape is dominated by the Rock of Gibraltar, at the foot of which is a densely populated town area, home to some 32,688 people, primarily Gibraltarians.