Plan of the cathedral of Pisa, horizontal combination of various levels
<a href="https://en.wikipedia.org/wiki/Georg_Dehio" class="extiw" title="en:Georg Dehio">Georg Dehio</a> (1850–1932), screenshot &amp; upload <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>) 09:52, 31 May 2015 (UTC)
1887
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