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