 In its form, Tantallon follows on from the 12th-century castles of Bothwell and Kildrummy, as a castle of enceinte, or curtain wall castle. It was the last of this type to be built in Scotland, as the smaller tower house was becoming increasingly popular. For example, Threave Castle, built at around the same time by Earl William's cousin Archibald the Grim, is a much more modest tower. There are also similarities between Tantallon and "courtyard" castles, such as Doune, which also dates from the late 14th century, and is entered via a passage beneath a strong keep tower.
