{{Short description|Small tower or aqueduct tank in ancient Rome}} {{Italic title}} {{Multiple image | header = Castellum | image1 = Reconstructed Limes watch tower, between Bad Nauheim and Pfaffenwiesbach.jpg | alt1 = | caption1 = 1. ''Limes'' watchtower, Germany (reconstruction) | image2 = Castellum PS01.JPG | alt2 = | caption2 = 2. Ruins of a ''castellum divisorium'', France }}

A '''''castellum'''''<ref>Charlton T. Lewis, Charles Short, A Latin Dictionary</ref> in Latin is usually:

* a small Roman fortlet or tower,<ref>C. Julius Caesar, Gallic War; 2,30</ref> a diminutive of {{lang|la|castrum}} ('military camp'), often used as a watchtower or signal station like on Hadrian's Wall. It is distinct from a {{lang|la|burgus}}, which is a later Latin term that was used particularly in the Germanic provinces. * a distribution, header, and settling tank for municipal water in a Roman aqueduct (known as a ''castellum aquae''/''castellum divisorium'').

It is the source of the English word "castle".

==References== {{Reflist}}

{{Fortifications|state=collapsed}} {{Authority control}}

Category:Roman fortifications Category:Roman aqueducts

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