If you still can't tell how big this piece is by this photo of me standing at the corner, here's Jule photographing the piece with the room tables set up. 
All I had left to do was to varnish the mural. I was able to put three coats of acrylic varnish over it on the last day. It took a full day to varnish it but I taught classes as I waited for each coat to dry. I suggested to the manager of the center that they discourage the taping of posters or excessive touching of the piece for a few months, at least. But my best suggestion is that if they or you have a large mural that was expressly created by an artist or that you desire to keep for any extended period of time, an investment in a plexiglass cover would keep your piece beautiful for years to come.