Borders of the city of <a href="//commons.wikimedia.org/wiki/Bielefeld" title="Bielefeld">Bielefeld</a> since 1908 (after the first moderate annexions), since 1930 (first major enlargement), and since 1974 (as present, with the borders of the 10 boroughs)
<a rel="nofollow" class="external text" href="http://www.bielefeld.de/">Stadt Bielefeld</a>, PNG by <a href="//commons.wikimedia.org/wiki/User:Ludger1961" title="User:Ludger1961">ludger1961</a> 2007-05-20, additions &amp; re-upload by <a href="//commons.wikimedia.org/wiki/User:Ulamm" title="User:Ulamm">Ulamm</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Ulamm" title="User talk:Ulamm"><span class="signature-talk">talk</span></a>)
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