The Grand Opera House is referenced as built in 1874 on Sparks St, but also list on Albert Street at O'Connor, built by William Hodgson. http://www.dictionaryofarchitectsincanada.org/architects/view/262 

Doerr's Opera House operated out of the second floor of the building on the northwest corner of 6th and Maine Streets.
http://www.idaillinois.org/cdm/ref/collection/qpl/id/1589

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 

See Good's Opera House

Joe Vogel on January 5, 2012 at 4:52 am  The Majestic Theatre was an extensive rebuilding of the Utica Opera House, which had been built in 1871. When Sam Shubert took over the lease on the Opera House in 1900, he had the building largely gutted and expanded to create a space for a more modern theater. In addition to the new Majestic, the building housed a second-floor assembly room at the Washington Street corner of the structure, and this was converted into the Orpheum Theatre in 1901. 

The Paterson Opera House was opened on April 2, 1866.In 1900 it was severely damaged in a fire. It was rebuilt and reopened in 1901. In 1914 another fire caused some damage and following renovations it reopened as the U.S. Photo Play Theatre on March 6, 1916 with the film “Battle Cry of Peace”. It was listed in 1930 as the United States Theatre with a 2,000 seat capacity and equipped with an RCA sound system. It was operated by the Stanley Warner chain and was closed in September 1967.

The building was sold and demolished in 1969.

The cultural life of the city of Winona was supported by the establishment of the  Winona Opera House and Philharmonic Hall. These buildings were the sites of many locally produced plays and theatrical performances. They were also used for performances by famous  visiting artists, lecturers, and musicians who were brought to Winona by O. F. Burlingame,  the astute Impresario of the Winona Opera House.

One source reported that Platt's Hall opened in 1860. Jack Tillmany reports that the first newspaper accounts of events there that he found were in July 1862. The building was on the NE corner of Montgomery and Bush.

It's listed in an 1882 "Guidebook and Street Manual." It was still operating as late as 1885. The Mills Building was later on the site.

http://sanfranciscotheatres.blogspot.com/2019/01/platts-hall.html

Powers’ Theatre

A historic timeline of the Powers’:
Opera House Block 1874–1979
Powers’ Opera House (1874),
Powers’ Grand Opera House (1887),
Powers’ Theatre (1902–44),
Foto News (1944–48),
Midtown Theatre (1948–1972),
Civic Theatre (Under Renovation 1975–1977),
Demolished (Jan 1979)

Dr. Rudolphus Rouse's Performance Hall was located at the North West corner of Main and Jefferson Streets, and played host to many theatrical and opera companies. It was called "Main Street" theater after 1902. 

http://collections.carli.illinois.edu/cdm/ref/collection/bra_peoria/id/1

The Royal Aquarium and Winter Garden was a place of amusement in Westminster, London. It opened in 1876, and the building was demolished in 1903. The attraction was located northwest of Westminster Abbey on Tothill Street. The building was designed by Alfred Bedborough in an ornamental style faced with Portland stone.

Through the years there were eight theaters in Plainfield. The Stillman Music Hall (216 W. Front Street) was built in 1884. Its entertainments included plays, lectures, concerts, operas, minstrel shows and variety stars until it closed in 1901.  http://www.plainfieldlibrary.info/OnlineExhibits/LBNF/Theaters.html

Taylor Opera House was an opera house in Trenton, New Jersey. It was the city's first theater, and was founded by John Taylor, creator of Pork Roll and one of Trenton's leading citizens. The building first opened March 18, 1867 at 18 S. Broad Street. A historical marker was placed on the site after its demolition.

The Taylor Opera House was built by James S. Taylor, according to the book series, “Images of America, Danbury”. He originally solved the problem of felting hats with the Taylor sizing machines (Danbury was the hat capitol of the world) by machinery. He was born in 1825 and was the great-great-great-grandson of Thomas Taylor, an original settler of Danbury.

The Real Teatro di San Carlo (English: Royal Theatre of Saint Charles) is an opera house in Naples, Italy. It is located adjacent to the central Piazza del Plebiscito, and connected to the Royal Palace. It is the oldest continuously active venue for public opera in Europe, opening decades before both the Milanese La Scala and Venetian La Fenice theaters.
https://en.wikipedia.org/wiki/Teatro_di_San_Carlo

The Upper Crust of Naples

The Temperance Hall was built in 1853 on a site fronting onto Granby Street, Leicester. The Architect was James Medland of Gloucester. The main hall was 100 feet long by 58 feet wide, and could seat 1,800 people. It had a balcony on three sides with a platform stage at the far end.

Built at a cost of $60,000, the top two levels of the Metropolitan’s three stories were devoted to its 1200-seat theater, while the street level featured storefronts, a cagey hedging of bets on the part of Butsch. Other theater managers struggled with low attendance and protests by local clergy of the “immoral character” of the theater, so Butsch called his establishment a hall, rather than a theatre.

t is unknown if this is the location of Mark Twain's lecture.  A literature search has so far failed to uncover another theater at this date.

The Theatre Royal, Drury Lane, commonly known as Drury Lane, is a West End theatre and Grade I listed building in Covent Garden, London, England.

“A Minstrel Town”, by Marion S. Revett, published by Pageant Press Inc. NY, in 1955. pp 87-97.  

Wheeler Opera House, on the other hand, was a fabulous place (The Wheeler narrative is right after another hall called White’s). It became known all over the theatrical world for its modern arrangements, its magnificent decorations and its stage and lighting facilities. Jeff Wheeler, wealthy business man and sportsman, was proud of this monument to his family name. 

Whitney s Grand Opera House on northwest corner of Shelby and Fort Streets seated 1 400 and was first used in 1875 and was torn down in 1887.

The history of detroit and michigan or the metropolis illustrated, Silas Farmer 1889

Magnificent, majestic and massive, Detroit’s old Federal Building and Post Office was a towering palace of government that was more than three decades in the making, took seven years to build — and only 34 years to outgrow.

The Wieting Opera House was a performance hall in Syracuse, New York, that hosted operas, films, and other performances from 1852 to 1930. Initially built by John Wieting in 1852 as Wieting Hall, the building burnt down in 1856. He rebuilt it that year, and in 1870 renovated the hall into an opera house.

Next door to the Sprague Block, on the southwest corner of State and Tioga, stood the Wilgus Block (1868). Brothers John M. Wilgus, an architect, and Henry L. Wilgus, a real estate dealer, built the Wilgus Block on the site of Dwight Tavern, an early "publick house." Wilcox and Porter of Buffalo designed the building. The Wilgus Opera House, seating 1600 people, occupied the third and fourth floors. Retail stores occupied the first floor, offices the second. The opera house was Ithaca's main entertainment center until the Lyceum Theater was built on South Cayuga Street in 1893.