Staircases of the second floor of <a href="//commons.wikimedia.org/wiki/Palazzo_d%27Accursio_a_Bologna" class="mw-redirect" title="Palazzo d'Accursio a Bologna">Palazzo d'Accursio</a> Palace in <a href="//commons.wikimedia.org/wiki/Bologna" title="Bologna">Bologna</a>, Italy. Picture by<a href="//commons.wikimedia.org/wiki/User:G.dallorto" title="User:G.dallorto">Giovanni Dall'Orto</a>,  February 9 2008.
<a href="//commons.wikimedia.org/wiki/User:G.dallorto" title="User:G.dallorto">Giovanni Dall'Orto</a>
Attribution
<span class="int-own-work" lang="en">Own work</span>