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Usually it is part of a medieval fortification. This may be a town or city wall, fortress, castle or castle chapel. The gate tower may be built as a twin tower on either side of an entranceway. Even in the design of modern building complexes, gate towers may be constructed symbolically as a main entrance. The gate tower can also stand as a twin tower on both sides of a gate system. Gate towers are also used symbolically as the main entrance in the design of modern building complexes. The Kasselburg in Rhineland-Palatinate has a double tower gate tower, which was also used as a residential tower.
The late 12th-century gate tower of Egremont Castle, Cumbria, England
- Burgen und feste Plätze : europäischer Wehrbau vor Einführung der Feuerwaffen : systematisches Fachwörterbuch = Châteaux-forts et places fortes : architecture militaire européenne avant l'introduction des armes à feu : dictionnaire spécialisé et systématique = Castles and fortified places : European military architecture before the introduction of firearms : specialized and systematic dictionary (3., neu bearbeitete und erw. Aufl ed.). München: K.G. Saur. 1996. ISBN 978-3-11-097269-6. OCLC 604518608.