The Ellie Caulkins Opera House is a prominent performing arts venue located in Denver, Colorado. Opened in 2005, it serves as the home for the Colorado Ballet and hosts various operas, concerts, and other cultural events. The opera house features a seating capacity of approximately 2,200 and is known for its excellent acoustics and modern design. The venue is part of the Denver Performing Arts Complex, one of the largest performing arts centers in the United States. It was named in honor of Ellie Caulkins, a philanthropist and supporter of the arts, who contributed significantly to its development and ongoing success.