The Tudor tower that survived

Bruce Castle, the 16th-century manor house in Tottenham, London, is named after the House of Bruce who historically owned a third of the manor of Tottenham. The tower, built of local red brick and standing about 21 ft (6.4 m) tall, with walls 3 ft (0.91 m) thick, is believed to be one of the earliest uses of brick as the principal building material for an English house. The tower sands for some distance below the current ground level, dating back to the 15th century according to some archaeological evidence. In 2006, excavations revealed that the tower continues below the ground level and was described in 1829 as being over a deep well and being used as a dairy.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons