- en.wikipedia.org Poznań FortressRemains of the Cathedral Lock (Dom Schleuse), part of the original inner ring of defences. Fort III, one of the outer ring of forts built in the late 19th century.
- kocham-poznan.fandom.com wiki/Fortress_PoznańFortress Poznań is the third largest collection of fortications in Europe. The fortress was built in the 19th Century being started by Karl von Grolman...
- inyourpocket.com poznan/poznans-forts_73834fThe resulting Battle of Poznań lasted for a full month. Though the fortress ultimately fell to the 100,000 Soviet soldiers (and some 5,000 Polish ones)...
- tracesofwar.com sights/11555/Festung-Posen---Fort…Fort I was a component of fortress Poznań and is constructed in the period 1878 - 1888.
- commons.wikimedia.org wiki/Category:Twierdza_…...Poznańs festning; Vesting Poznań; forteresse de Poznań; Тврђава Познањ; Fortaleza de Poznań; Poznańin linnoitus; Poznań Fortress; Poznań Fortress
- foursquare.com cityofpoznan/list/twierdza-poznań…Muzeum Armii Poznań is one of Twierdza Poznań // Poznań Fortress. ... Makieta Dawnego Poznania is one of Twierdza Poznań // Poznań Fortress.
- wikidata.org wiki/Q50127set of fortifications in the city of Poznań in western Poland.
- visitpoznan.info en/poznan/history/The fortified settlement and Poznań of the first PiastsThe history of Poznań, as in the case of the majority of old towns, began with water.
- panopro.cz en/reference/pevnost-poznani/Fortress of Knowledge. See also other references.
- planergo.com en/sights/poznan-citadel/Fort Winiary was part of Fortress Poznań (Festung Posen), a system of defensive fortifications around the city built under Prussian rule in the 19th century.
- visitpoznan.pl en/poznan-top-10This largest park in Poznań is only a 15-minute walk from the Old Market Square and hides many secrets. It is a relic of a 19th century fortress and the largest...
- facebook.com DniTwierdzyPoznan/4,036 likes · 16 talking about this · 88 were here. Doroczne święto poznańskich miłośników historii i fortyfikacji.
- tripswithkids.eu fort-va-poznan/We went with the children to visit one of the buildings Fortress Poznan. Particular object was a fort Va "Zwischenwerk Bonin" located at Lechicka Street.