Ten historic arsenal buildings: Venice, Vienna, Dresden Albertinum, Berlin Zeughaus, Gdansk Great Armoury, Solothurn Old Arsenal, Graz Styrian Armoury, the Grand Store at Woolwich Royal Arsenal, Portsmouth Vulcan Building and Copenhagen Tojhus. An architectural selection, not a ranking of military power, age or size. The Vienna photograph shows entrance building Objekt 1, not Hansen’s separate museum building. Dresden and Berlin have later museum histories. Woolwich shows warehouse Building 49, not an operating factory. Portsmouth’s Vulcan is a surviving range of a modified historic complex. Tojhus is not the neighboring brewery. Disputed precise foundation dates for Venice and construction end dates in Graz are not repeated. Photographs from 2007–2023 do not establish present access, condition or military operations. Authors and open licenses are listed below. Venetian Arsenal: Didier Descouens; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0/; https://commons.wikimedia.org/wiki/File:Campo_de_l%27Arsenal.jpg; resized and fitted to portrait frame; derived image retains the source license. Vienna Arsenal: Guido Radig; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0/; https://commons.wikimedia.org/wiki/File:Arsenal_in_Wien.jpg; resized and fitted to portrait frame; derived image retains the source license. Albertinum: CEphoto, Uwe Aranas; CC BY-SA 3.0; https://creativecommons.org/licenses/by-sa/3.0/; https://commons.wikimedia.org/wiki/File:Dresden_Germany_Albertinum-01.jpg; resized and fitted to portrait frame; derived image retains the source license. Berlin Zeughaus: Gerd Eichmann; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0/; https://commons.wikimedia.org/wiki/File:Berlin-Zeughaus-02-2017-gje.jpg; resized and fitted to portrait frame; derived image retains the source license. Great Armoury: Nikater; CC BY-SA 3.0; https://creativecommons.org/licenses/by-sa/3.0/; https://commons.wikimedia.org/wiki/File:Gda%C5%84sk_G%C5%82%C3%B3wne_Miasto_-_ul._Piwna_%28Great_Armoury%29.jpg; resized and fitted to portrait frame; derived image retains the source license. Old Arsenal: Krzysztof Golik; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0/; https://commons.wikimedia.org/wiki/File:Altes_Zeughaus_in_Solothurn.jpg; resized and fitted to portrait frame; derived image retains the source license. Styrian Armoury: E.mil.mil ( talk ); CC BY-SA 3.0 at; https://creativecommons.org/licenses/by-sa/3.0/at/; https://commons.wikimedia.org/wiki/File:Graz_Zeughaus.L1270367.jpg; resized and fitted to portrait frame; derived image retains the source license. Royal Arsenal: PAUL FARMER; CC BY-SA 2.0; https://creativecommons.org/licenses/by-sa/2.0/; https://commons.wikimedia.org/wiki/File:Building_49%2C_The_Grand_Store_Warehouse%2C_Royal_Arsenal%2C_Woolwich_-_geograph.org.uk_-_2498229.jpg; resized and fitted to portrait frame; derived image retains the source license. Vulcan Building: The wub; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0/; https://commons.wikimedia.org/wiki/File:The_Vulcan_Building%2C_Portsmouth_-_2023-04-23.jpg; resized and fitted to portrait frame; derived image retains the source license. Royal Arsenal Tojhus: Ib Rasmussen; Public domain (author dedication); https://commons.wikimedia.org/wiki/File:Arsenal_Museum_Copenhagen_facade.jpg; https://commons.wikimedia.org/wiki/File:Arsenal_Museum_Copenhagen_facade.jpg; resized and fitted to portrait frame; derived image retains the source license.