The Sieges of Ceuta (also known as the Thirty-year Siege) were a series of blockades by Moroccan forces of the Spanish-held city of Ceuta on the North African coast. The first siege began on 23 October 1694 and finished in 1720 when reinforcements arrived. During the 26 years of the first siege, the city underwent changes leading to the loss of its Portuguese character. While most of the military operations took place around the city walls (Muralles Reales), there were also small-scale penetrations by Spanish forces at various points on the Moroccan coast, and the seizure of shipping in the Strait of Gibraltar. The city was placed under a second siege in 1721 until 22 April 1727. The engagements are considered to be the longest siege in history.