Barbican of Warsaw
...that the Barbican of Warsaw became obsolete almost immediately after its construction in 1548?
...that the <b id="mwBVk"><a class="mw-redirect" href="./Barbican_of_Warsaw" id="mwBVo" rel="mw:WikiLink" title="Barbican of Warsaw">Barbican of Warsaw</a></b> <i id="mwBVs">(pictured)</i> became obsolete almost immediately after its construction in <a href="./1548" id="mwBVw" rel="mw:WikiLink" title="1548">1548</a>?