The tunnel that connects the Undergraduate to the Main Library (underground) has gone through several renovations over the decades. Some of these also included renovations to the Espresso Royale Cafe that is in between the tunnel and the UGL.
2004-2005 Renovation
https://news.illinois.edu/view/6367/211355
2016-2017 Additional Tunnel Renovations
Below is the Grand Opening Ceremony of the Espresso Royale Cafe, April 17, with Jeff Schrader speaking, as well as Lori Holmes.
Murals in UGL tunnel depict aspects of University’s 150-year history