Located on the river, the Opera House is an odd building to photograph.  On the river side, there is largely a flat wall (behind the actual theater) which is not very photo friendly.  However, the back of the building is in the shape of a throne (look for it), which adds interest, but is harder to capture.  

https://www.lyricopera.org/about/private-events-and-rentals/

https://en.wikipedia.org/wiki/Civic_Opera_House_(Chicago)