伦敦塔（英文：Tower of London）是位于伦敦市中心的一座宫殿和城堡，其官方名称是“女王陛下的宫殿与城堡，伦敦塔”（英文：Her Majesty's Palace and Fortress, The Tower of London），因此虽然将其作为宫殿居住的最后一位统治者已是几世纪前的詹姆士一世（1566年至1625年），但在名义上它至今仍是英国王室宫殿。白塔（不以建筑风格及材料为名，而是建成当时，整体漆成白色而得名）实际上是在伦敦泰晤士河边的几座塔楼的组合体中间；伦敦塔曾作为堡垒、军械库、国库、铸币厂、宫殿、刑场、公共档案办公室、天文台、避难所和监狱，特别关押上层阶级的囚犯。最后的这一用途产生一条短语“sent to the Tower”，意思是“入狱”。伊丽莎白一世在她姐姐玛丽一世统治时曾在此入狱一段时间；伦敦塔最后一次作为监狱使用是在第二次世界大战期间，关押鲁道夫·赫斯。1988年被列为世界文化遗产。

The Tower of London, officially Her Majesty's Royal Palace and Fortress of the Tower of London, is a historic castle located on the north bank of the River Thames in central London. It lies within the London Borough of Tower Hamlets, separated from the eastern edge of the square mile of the City of London by the open space known as Tower Hill. It was founded towards the end of 1066 as part of the Norman Conquest of England. The White Tower, which gives the entire castle its name, was built by William the Conqueror in 1078, and was a resented symbol of oppression, inflicted upon London by the new ruling elite. The castle was used as a prison from 1100 (Ranulf Flambard) until 1952 (Kray twins), although that was not its primary purpose. A grand palace early in its history, it served as a royal residence. As a whole, the Tower is a complex of several buildings set within two concentric rings of defensive walls and a moat. There were several phases of expansion, mainly under Kings Richard the Lionheart, Henry III, and Edward I in the 12th and 13th centuries. The general layout established by the late 13th century remains despite later activity on the site.