Interesting. Reminds me of Montreal&#x27;s external stairs[]; oddly I still haven&#x27;t found a historically backed (citations, research) account of why it has them.<p>[] e.g. <a href="https:&#x2F;&#x2F;chicagomontreal.wordpress.com&#x2F;2007&#x2F;05&#x2F;19&#x2F;les-escaliers-de-montreal&#x2F;" rel="nofollow">https:&#x2F;&#x2F;chicagomontreal.wordpress.com&#x2F;2007&#x2F;05&#x2F;19&#x2F;les-escalie...</a>