The History section of the Opera House website says:

A Historic Theatrical Masterpiece Restored to its Original Beauty.

The Citizens Bank Opera House is one of the finest examples of the vaudeville circuit palace at the pinnacle of its development. Designed in a combination of French and Italian styles by Thomas White Lamb, one of the foremost theatre architects of his day, it was erected under the close personal supervision of Edward Franklin Albee to memorialize his late partner, Benjamin Franklin Keith. Because it was constructed as a memorial and tribute to vaudeville’s greatest impresario, it was built with a degree of luxury in its appointments that is almost unrivaled.

Wikipedia has this (and much more, especially on its history) to say:

The Boston Opera House, also known as the Citizens Bank Opera House, is a performing arts and esports venue located at 539 Washington St. in Boston, Massachusetts. It was originally built as the B.F. Keith Memorial Theatre, a movie palace in the Keith-Albee chain. The chain became part of RKO when it was established just before the theater opened on October 29, 1928, and it was also known as the RKO Keith’s Theater. After operating for more than 50 years as a movie theater, it was rededicated in 1980 as a home for the Opera Company of Boston, which performed there until the opera company closed down in 1990 due to financial problems. The theater was reopened in 2004 after a major restoration, and it currently serves as the home of the Boston Ballet and also hosts touring Broadway shows.

Taken with a Sony A6000 and 18-135mm f3.5-5.6 OSS

Eventually we ended up on Washington Street where my friend wanted to do a little shopping. I took this picture of The Paramount Theater.

“The Paramount opened in 1932 as a 1,700-seat, single-screen movie theatre. It was one of the first movie houses in Boston to play talking motion pictures. The theatre was named after its original owner, Paramount Pictures. It closed in 1976 and most of the Art Deco interior decoration was destroyed in the 1980s during the removal of asbestos.[2] In 1984, the building was designated a Boston Landmark by the Boston Landmarks Commission.

In 2002, Millennium Partners agreed to restore the Paramount’s facade, marquee, and vertical sign in exchange for city approval of their adjacent Ritz-Carlton Towers project. The city occasionally lighted the sign at night. The city’s hopes that the site would be developed by the Cambridge-based American Repertory Theater were not fulfilled.

In April 2005, Emerson College announced plans to renovate the Paramount Theatre and build a performing arts facility in and around the original building. The $77 million project involved the renovation of the building and adjacent parcels of land into a complex containing a 550-seat theater, a Performance Development Center, a student residence hall, a 125-seat black box theater, a 170-seat film screening room, eight rehearsal studios ranging from 700 square feet (65 m2) to 1,900 square feet (180 m2), six practice rooms for individuals and small groups, a sound stage for film production classes, a scene shop, several classrooms, a restaurant, and up to a dozen offices for faculty and staff. Design was by Elkus Manfredi Architects, Boston.[3] Acentech Incorporated consulted on the acoustical design of the facility, providing guidance on room acoustics, sound isolation between the stacked spaces on the tight urban site, and mechanical system noise control in the historic building.

The project was completed in early 2010. On March 18, 2010, Emerson College celebrated the grand re-opening of the Paramount Theater with Mayor Thomas Menino.” (Wikipedia).

Taken with a Sony A6000 and 18-135mm f3.5-5.6 OSS