siege tower
siege tower is a tower or siege engine.
Also recorded as breaching tower; belfry.
Overview
Catalogue entries for arms and armour state maker, marks, mechanism and, where relevant, licensing. VALÉORINE records this subject so that lots referring to it can be described consistently.
In detail
usually multi-storey wooden structures on wheels or castors, designed to scale enemy fortified walls
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Siege tower”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q622666: siege tower
Consult the source