Also known as the Grand Opera House 

HISTORICAL NOTE 

Grand Opera House
113-117 North Wyman Street,
Rockford, IL

Incorporated: November 6, 1880
Opened: November 12, 1881
Seating: 1500
Closed (as an Opera House): 1917
Demolished: April, 1927

http://www.oscarwildeinamerica.org/lectures-1882/march/0302-rockford.html 

January 30, 1885 

Imagery courtesy: http://grandoperahouse.org/History/